2024 Commercial Mechanical Inspector – Flashcards

Joints between CPVC plastic pipe or fittings for ground-source heat pump systems must be what two specific types of joints?

An indirect open-spray system is not required to be classified as a high-probability system if the pressure of the secondary coolant is at all times greater than what other pressure?

A thermostat in which the thermostatic valve travels instantly from the closed to the open position, and vice versa, is a:

Where gas piping systems for other than dry gas conditions have condensate, a drip shall be provided with ready access to permit:

Piping, tubing, and fittings must be tested by an approved third-party testing agency or certified by which other type of agency?

What is the minimum required depth for a grease duct reservoir?

Where commercial cooking appliances are vented by a fan-powered exhaust hood system, the appliances must be interlocked with the exhaust hood system to prevent appliance operation when the exhaust hood system is not operating.

Decorative appliances for installation in approved solid fuel-burning fireplaces shall be listed in accordance with which ANSI/CSA standard?

For appliances in a dwelling unit basement, the unobstructed passageway must be large enough to allow removal of the largest appliance and measure not less than what minimum width?

Compressed gas containers and tanks, except for small volume units, shall be used in an upright position where the container axis is inclined as much as what maximum angle from the vertical?

For appliances in attics, the continuous solid flooring of the passageway must be not less than what minimum width?

What is the minimum duration required for the hydrostatic test on hydronic piping systems?

For intake openings in residential occupancies, the maximum opening size in louvers, grilles, and screens must be less than or equal to what dimension?

CSST gas piping systems (without an arc-resistant jacket) must be electrically continuous and bonded to the electrical service grounding electrode system or, where provided, which other system?

For a mechanically ventilated refrigerant pipe shaft with a cross-sectional area of 30 square inches, what is the minimum ventilation velocity required?

The remaining space surrounding a chimney liner installed within a masonry chimney flue is prohibited from being used to vent another appliance.

If there is insufficient evidence of compliance with the provisions of this code, the code official shall have the authority to require what as evidence of compliance?

Smoke detectors are not required in the return air system if all portions of the building served by the air distribution system are protected by what type of system?

Pollution-control units must be listed and labeled in accordance with which standard?

An installation regulated by this code constituting a hazard to health, safety, or welfare by reason of inadequate maintenance, fire hazard, or abandonment is declared to be a(an):

The pressure difference created by the action of a fan, blower or ejector that is located between the appliance and the chimney or vent termination is defined as:

Any person commencing work on a mechanical system before obtaining necessary permits shall be subject to a fee that is:

What must an approved agency periodically perform to verify that labeled equipment and appliances are representative of those tested?

A valve located in the piping system, used to isolate individual appliances for purposes such as service or replacement, is a(an):

Brazed joints in fuel oil piping systems must use a filler metal conforming to which AWS standard?

What is the minimum flash point for Fuel Oil?

If manufacturer’s instructions for a refrigerator are unavailable, what is the minimum clearance required above the top of the refrigerator?

Work shall not be done beyond the point indicated in each successive inspection without first obtaining whose approval?

What is the minimum clearance required between a single-wall metal pipe connector and combustible material when serving a listed appliance with a draft hood?

Combustion air intake openings located on the exterior of a building shall have the lowest side of such openings located not less than what distance vertically from the adjoining finished ground level?

Reports not complying with Section 104.2.3.6.1 must describe criteria and justify:

How many members shall the board of appeals consist of?

Any apparatus or device that utilizes a fuel or a raw material as a fuel to produce light, heat, power, refrigeration or air conditioning is a(an):

Official records related to this code shall be retained for not less than 5 years or for as long as:

For institutional occupancies, the maximum allowable refrigerant amounts shown in Table 1103.1 must be reduced by what percentage?

The pressure of the weight of air and water vapor on the surface of the earth, approximately 14.7 psi (101 kPa absolute) at sea level, is defined as:

For a single-appliance venting configuration, if the height (H) is less than 6 feet or greater than shown in the tables, what method must be used to calculate the vent capacity?

For an Elevator car in public spaces, what is the required Exhaust Airflow Rate in CFM/ft squared?

In a Balanced Ventilation System, the mechanical supply airflow rate and mechanical exhaust airflow rate must each be within what percentage of the average of the two airflow rates?

Clothes dryer exhaust ducts must terminate not less than how many feet in any direction from openings into buildings, where the manufacturer’s instructions do not specify a location?

A hazardous exhaust system is required if a flammable vapor, gas, fume, mist, or dust is present in concentrations exceeding what percentage of the lower flammability limit (LFL)?

A change in a mechanical system that involves an extension, addition, or change to the arrangement, type, or purpose of the original installation is defined as what?

If a greater quantity of air is supplied by a mechanical ventilating supply system than is removed by a mechanical exhaust for a room, adequate means shall be provided for what?

Factory-built chimneys for medium-heat appliances producing flue gases above 1,000°F (538°C) measured at the entrance to the chimney must comply with which UL standard?

A Class B Toxicity classification for a refrigerant indicates what characteristic?

Which constituent is specifically excluded from the definition of Combustion Products?

Electric motors driving exhaust fans in spray-finishing operations shall not be placed in which locations?

A valve used in conjunction with an automatic gas shutoff device to shut off the gas supply to a water-heating system is a(an):

The code official is authorized to revoke a notice of approval if it is determined that the building or structure is in violation of what?

High-probability systems used for human comfort must use which refrigerant safety groups?

A flame, spark or hot surface capable of igniting flammable vapors or fumes is a(an):

A Thermoplastic is a plastic that is capable of being repeatedly softened by increase of temperature and hardened by decrease of temperature. What is the characteristic of a Thermosetting plastic?

A gas having a moisture and hydrocarbon dew point below any normal temperature to which the gas piping is exposed is defined as:

Installations that are part of buildings moved into or within the jurisdiction shall comply with the provisions for:

A joint made in thermoplastic piping by heating the parts sufficiently to permit fusion of the materials when the parts are pressed together is a:

Which two piping materials shall not be used in contact with R-40 (methyl chloride)?

TABLE 614.9.4.1 QUESTION: What is the equivalent length reduction required for a 6-inch radius smooth 90-degree elbow in a domestic dryer exhaust duct?

Factory-built cremation furnaces and commercial direct-fed incinerators must be listed and labeled in accordance with which UL standard?

What is the capacity in cfh for CSST Flow Designation 48 at 200 feet in length, with an initial supply pressure of 11.0 in. w.c. or greater and a 6.0 in. w.c. pressure drop?

For double-wall heat exchangers, an air gap open to the atmosphere must be provided between the two walls, and the discharge location from the heat exchanger must be what?

A water heater pan constructed of plastic must have a minimum thickness of not less than what dimension?

Clothes dryer installations exhausting more than how many CFM shall be provided with makeup air?

What is the minimum clearance required from the sides and rear of an appliance where the original required clearance was 12 inches, and the protection is 0.024-inch sheet metal with ventilated airspace?

Any person who continues work after being served with a stop work order shall be subject to what?

Solder joints in a metal pipe transitioning to PE-RT pipe shall not occur within what minimum distance of the transition point?

An alternative material or design must be equivalent to that prescribed in this code with respect to strength, effectiveness, durability, safety, and which other criterion?

When soldering on the metal portion of a PEX ground-source system, the solder joints shall be performed not less than what minimum distance from a plastic-to-metal adapter in the same water line?

Acceptable to the code official is the definition of which term?

A Drain-Back System is a solar thermal system in which the fluid in the solar collector loop is gravity drained into a holding tank under what circumstances?

Active or engineered smoke control systems must be capable of continued operation after detection of the fire event for a period of not less than 20 minutes or what alternative duration?

Mechanical ventilation systems for enclosed parking garages shall operate continuously or shall be automatically operated by means of carbon monoxide detectors applied in conjunction with what other detector type?

Where two or more meters are installed on the same premises but supply separate consumers, interconnection is prohibited on which side of the meters?

Which ASSE standard is listed as applicable for Copper and copper alloy fittings in Table 1202.5?

Devices used for making CSST bonding connections shall be listed for the application in accordance with which UL standard?

What is required for the assertion of certification when a product is Third-Party Certified?

Domestic booster fans are prohibited from being installed in dryer exhaust systems.

What must an organization concerned with product evaluation maintain for the Labeled items?

Pressure relief devices, fusible plugs, and purge systems located within the machinery room shall terminate outside the structure not less than how many feet above the adjoining grade level?

An approved agency operating a product or material certification system that incorporates initial product testing, assessment and surveillance of a manufacturer’s quality control system is a:

What is the minimum separation distance required for the atmospheric venting of CNG from lot lines?

A portion of a venting system using a fan or other mechanical means to cause the removal of flue or vent gases under positive static vent pressure is a:

Appliances installed in outdoor locations must be either listed for outdoor installation or provided with protection from:

Which fluid is explicitly excluded from the definition of Heat Transfer Liquid?

One ton of Refrigeration Capacity Rating is equivalent to how many Btu/h?

Field drilling and tapping of pipe fittings must only be performed on systems having operating pressures of what maximum amount?

A portion of a venting system using a fan or other mechanical means to cause the removal of flue or vent gases under nonpositive static vent pressure is a:

If a replacement refrigerant is classified into a different safety group, what additional requirement must the system comply with, besides meeting new installation requirements?

Protective assemblies shall not be placed less than how many inch(es) from the mechanical appliances, devices, or equipment?

Basements or pits in bulk plants or terminals where Class I liquids are stored or used must be provided with ventilation designed to prevent what?

Construction or work for which a permit is required shall be subject to inspection by the code official and shall remain visible and able to be accessed for inspection purposes until when?

Diffusers, registers, and grilles are prohibited in the floor or its upward extension within toilet and bathing rooms, except in which type of space?

For buildings more than two stories in height, construction documents shall indicate where penetrations will be made for installations and shall indicate the materials and methods for maintaining required structural safety, fireblocking, and:

A self-contained, automatically controlled, vented, fuel-gas-burning, space-heating appliance, intended for installation in the space to be heated without the use of ducts, and having integral means for circulation of air, is a:

Access points for dampers must be permanently identified on the exterior by a label having letters not less than what height?

All of the written, graphic and pictorial documents prepared or assembled for describing the design, location and physical characteristics of the elements of the project necessary for obtaining a mechanical permit are:

Ozone gas generators having a maximum ozone-generating capacity of 1/2 pound (0.23 kg) or more over a 24-hour period must be mechanically ventilated at a rate of not less than how many air changes per hour?

A natural gas, manufactured gas, liquefied petroleum gas or mixtures of these gases is defined as:

Packaged electric boilers must be listed and labeled in accordance with which UL standard?

Products of combustion plus excess air in appliance flues or heat exchangers are defined as:

Guards shall be constructed so as to prevent the passage of a sphere of what maximum diameter?

An Evaporative Cooler is a device used for reducing the sensible heat of air for cooling by the process of evaporation of water into what?

A heater in which all the products of combustion generated by the burners are released into the air stream being heated, with the purpose of offsetting building heat loss by heating only outdoor air, is a:

Exhaust ventilation for powder-coating operations must be sufficient to maintain the atmosphere below what concentration of the minimum explosive concentration?

The organization publishing a list of materials, products, or services must be acceptable to whom for the item to be considered Listed?

Limited spraying spaces must have positive mechanical ventilation that provides not less than how many complete air changes per hour?

Alterations resulting in the addition of loads to a truss, such as HVAC equipment, shall not be permitted without verification that the truss is capable of supporting what?

Air that is conveyed to or from occupied areas through ducts that are NOT part of the heating or air-conditioning system is defined as what?

In a dwelling unit, if an appliance is installed in a closet, the unobstructed passageway must measure not less than how many inches wide?

The required level platform on a sloped roof must be not less than how many inches in any dimension?

The code official is authorized to give permission for temporary service utilities in accordance with which section?

The opening provided in a draft hood to permit the ready escape of flue products in the event of no draft, back draft or stoppage, and to permit air into the draft hood in the event of a strong chimney updraft, is the:

Closed-type expansion tanks for systems designed to have an operating pressure in excess of 30 psi (207 kPa) must be constructed and certified in accordance with which standard?

Coverage for piping systems extends from the point of delivery to the outlet of which component?

What is the minimum clearance to combustibles required for connectors serving oil and solid-fuel domestic-type appliances?

A permanent mechanical joint incorporating an elastomeric seal and made with a pressing tool and jaw or ring approved by the fitting manufacturer is a:

For piping systems having a volume of more than 24,000 cubic feet (680 m3), the duration of the pressure test shall not be required to exceed what maximum period?

Which of the following is not one of the criteria against which an alternative material, design, or method of construction must be found equivalent?

Where two or more openings are provided into one chimney flue or vent, the connectors must be attached to the vertical portion at an angle of not more than how many degrees relative to the vertical?

Required test and inspection records shall be available to the code official at all times during the erection of the building and the fabrication of the:

Balancing baffles must be mechanically locked in the desired position before placing the appliance in operation.

The passageway of domestic dryer exhaust duct terminals shall be undiminished in size and shall provide an open area of not less than what minimum size?

The minimum mechanical ventilation rate determined by Equation 4-9 can be reduced by 30 percent if the system supplies ventilation air directly to each bedroom and to one or more of which specific rooms, AND the system is a balanced ventilation system?

Which category of condensing appliances must be provided with an auxiliary drain pan where damage to any building component will occur as a result of a stoppage?

Hydrogen piping located inside of buildings must be installed in exposed locations and provided with ready access for visual inspection, except for which condition?

Exhaust inlets for manicure and pedicure stations must be located not more than how many inches horizontally and vertically from the point of chemical application, if a factory-installed inlet is not provided?

Which classification of Dry Cleaning Systems uses Class I flammable liquid solvents?

Mechanically extracted outlets for mechanically formed tee fittings must have a height not less than what multiple of the thickness of the branch tube wall?

What is the minimum clearance required from the sides and rear of a vertical connector where the original required clearance was 9 inches, and the protection is 0.024-inch sheet metal over 1-inch glass fiber or mineral wool batts with ventilated airspace?

Who must sign the application for a permit?

The provisions of this code are not intended to prevent the installation of any material or to prohibit any design or method of construction, provided the alternative is not specifically prohibited by this code and has been what?

What is the minimum clearance required above an appliance or horizontal connector where the original required clearance was 36 inches, and the protection is 0.024-inch sheet metal with ventilated airspace?

Elevation of the ignition source is not required for appliances that are listed as being resistant to what hazard?

Which inert gas is permitted as the test medium for R-744 refrigeration systems?

If manufacturer’s instructions for a refrigerator are unavailable, what is the minimum clearance required between the back of the refrigerator and the wall?

The termination of concealed condensate piping must be marked to indicate whether the piping is connected to which two types of drain?

Access to equipment on a roof shall not require walking on roofs having a slope greater than what ratio?

The permit or a copy shall be kept on the site of the work until the:

The prohibition of fuel-fired appliances in certain rooms does not apply to direct-vent appliances that obtain all combustion air from where?

Where a fire alarm system is required, the actuation of a duct smoke detector must activate what type of signal at a constantly attended location?

If a room without openings to the outdoors is ventilated through an adjoining room, what is the minimum required unobstructed area of the opening to the adjoining room?

A timer provided to control main burner operation of a sauna heater shall have a maximum operating time of what duration?

Where openings below grade provide required natural ventilation, the outdoor horizontal clear space measured perpendicular to the opening shall be what multiple of the depth of the opening?

Where earthquake loads are applicable, supports for appliances must be designed and installed for seismic forces in accordance with the requirements of the:

Requirements for the design, installation, maintenance, alteration and inspection of mechanical systems operating with fuels other than fuel gas are regulated by the:

When two or more appliances are connected, the vent connector length for a 12-inch diameter connector shall not exceed what maximum horizontal length?

What is the minimum clearance required from the sides and rear of a vertical connector where the original required clearance was 18 inches, and the protection is 3 1/2-inch-thick masonry wall without ventilated airspace?

What is the Refrigerant Safety Group Classification for R-290 (propane)?

Piping run from a pressure-regulating device to the outdoors, designed to provide a reference to atmospheric pressure, is defined as:

Exhaust ducts for commercial clothes dryers must have a minimum clearance of what distance to combustible materials?

Appliance connections to a chimney or vent equipped with a power exhauster must be made on which side of the exhauster?

What are the accepted standards used to determine the Flash Point of a liquid?

If work authorized by a permit is suspended or abandoned for a period of 180 days, the permit shall expire. If a new permit is required, what fraction of the original fee shall be charged, provided the abandonment has not exceeded 1 year and changes have not been made?

A commercial kitchen grease duct serving a Type I hood must be enclosed when it penetrates what feature?

The cutting, notching, and boring of holes in structural steel framing members shall be as prescribed by whom?

Reports of inspection conducted by approved agencies or individuals shall be submitted in writing and certified by:

Hydronic piping systems must be tested hydrostatically at what minimum pressure?

Where single-appliance venting tables show a lateral length (L) of zero (0), how many elbows are included in the venting configuration capacity listed in the table?

Where valves are identified by a numbering or lettering system, where must the legend(s) or key(s) for the valve identification be located?

The portion of an appliance within which combustion occurs is the:

What is the minimum dimension allowed for combustion air openings used to connect indoor spaces?

For a single appliance vented by a masonry chimney using a single-wall metal connector (Table 504.2(4)), if the height (H) is 8 feet and the lateral (L) is 8 feet, what is the maximum input rating (NAT Max) for a 12-inch connector?

What is strictly prohibited in hazardous exhaust ducts?

For a Private dwelling, single and multiple, what is the required continuous exhaust rate for a Kitchen?

Commercial cooking appliances installed on casters must be connected to the piping system with an appliance connector listed as complying with which standard?

Fire dampers are classified for use in either static systems or dynamic systems, where a dynamic system is one that continues to operate during what event?

Alterations resulting in the addition of loads to any truss member, such as HVAC equipment or water heaters, are prohibited without verification that the truss is capable of supporting such additional loading by a:

A hood and exhaust system is not required for protection from refrigerant decomposition if the refrigerant detector is used to automatically stop the combustion process in the event of what?

Equipment, materials, products or services included in a list published by an organization acceptable to the code official that maintains periodic inspection of production or evaluation of services is defined as:

Which of the following is NOT one of the required labeling descriptions for heat exchangers?

What is strictly prohibited from being used to line ducts or plenums from the exit of a cooling coil to the downstream end of the drain pan?

The provisions of this code are prohibited from nullifying the provisions of:

Gasket and sealing materials for cleanout doors in grease ducts must be rated for not less than what temperature?

A device for the final conveyance of the gas, or a mixture of gas and air, to the combustion zone is a:

For PEX piping systems, testing with a compressed gas is permitted as an alternative to hydrostatic testing only if specifically authorized by what documentation?

A structure utilized or intended for supporting or sheltering any occupancy is defined as what?

Unless otherwise approved, pressure vessels must be constructed and certified in accordance with which standard?

What is the minimum outside diameter (O.D.) tube size for corrugated stainless steel tubing (CSST) that is approved for a gas flow of 245 cfh at 25 feet in length, with an initial supply pressure of 8.0 in. w.c. or greater and a 3.0 in. w.c. pressure drop?

A room or space in which nonfuel-fired mechanical equipment and appliances are located is defined as what?

The total of all Group A2, B2, A3, and B3 refrigerants in all occupancies shall not exceed what maximum weight, except where approved?

Equipment and appliances having an ignition source shall not be installed in Group H occupancies or control areas where what occurs?

If the Maximum Primary Outdoor Air Fraction [$Max (Z_p)$] for a multiple zone recirculating system is 0.15 or less, what is the System Ventilation Efficiency ($E_v$)?

What is the purpose of a Draftstop?

Air that is introduced into a draft hood and is mixed with the flue gases is defined as:

The board of appeals shall be appointed by whom?

Permit fees for work requiring a permit shall be paid in accordance with the schedule established by the:

What is the maximum acceptable average optical density for combustible electrical wires and cables exposed within a plenum, when tested in accordance with NFPA 262?

Fuel gas devices, equipment, and appliances used with refrigeration systems must be installed in accordance with which code?

Dampers provided to balance airflow in hazardous exhaust systems must have securely fixed minimum-position blocking devices to prevent restricting the flow below what two required factors?

Vented gas fireplace heaters shall be listed in accordance with which ANSI/CSA standard?

What is the Refrigerant Safety Group Classification for R-1234yf?

Apparatus, material, and labor required for testing a mechanical system shall be furnished by whom?

Pipe-joint compound or tape must be applied only on which threads of a threaded fuel oil pipe joint?

Fuel oil pumps (not integral to an appliance) must be listed and labeled in accordance with which UL standard?

The clearance reduction methods specified in Table 308.4.2 shall not be utilized to reduce the clearances required for which type of chimneys?

Supply air ducts connecting to listed central heating furnaces must maintain the same minimum clearance to combustibles as required for the furnace plenum for a distance of not less than how far from the supply plenum?

Where enforcement of a code provision would violate the conditions of the listing of the equipment, what shall apply?

For a Type B double-wall vent serving two or more Category I appliances with single-wall metal connectors (Table 504.3(2)), if the vent height (H) is 10 feet and the connector rise (R) is 1 foot, what is the minimum input rating (FAN Min) for a 5-inch connector?

Where laboratory burners and gas lights are installed such that the aggregate input rating exceeds 20 Btu per hour per cubic foot of volume of the room, what must be provided?

To obtain a building permit, construction documents are required to be drawn to what characteristic?

What authority does the code official have regarding temporary uses, equipment, or systems permits?

When installing a floor furnace, a distance of not less than 18 inches (457 mm) must be provided from two adjoining sides of the floor furnace register to walls for which reason?

A shaft enclosure for a grease duct must be sealed around the grease duct at the point of penetration and vented to the outside of the building through what means?

The height requirement for solar thermal equipment exposed to vehicular traffic does NOT apply if what condition is met?

Gas vents 12 inches or less in size and located not less than 8 feet from a vertical wall must terminate above the roof in accordance with Figure 503.6.5.

Flared joints shall be used only in systems constructed from what type of piping material?

Where provided within a dwelling unit, controls for outdoor air ventilation systems must include text or a symbol indicating what?

Pressurized water storage tanks must bear a label showing the manufacturer’s name and address, model number, serial number, and what specific characteristics related to operating conditions?

What is the maximum circuit length allowed for 3/4-inch nominal tube size snow- and ice-melt tubing from a supply-and-return manifold arrangement?

Internal combustion engines used as gas engine-powered air conditioners shall not be connected to the gas supply piping in what manner?

What must boiler rooms be equipped with for disposing of liquid waste?

What is the maximum design temperature permitted for systems utilizing underground plastic duct and fittings?

Heat-fusion joints for polypropylene (PP) pipe and tubing joints in ground-source systems must be installed in accordance with which ASTM standard?

Solar thermal collectors and panels must be listed and labeled in accordance with which specific standard?

What is the minimum clearance required from noncombustible construction and gypsum wallboard attached to noncombustible structures for a shaft enclosure used for a grease duct?

What is NOT included in the calculation of Net Floor Area?

In the One-Permanent-Opening Method (304.6.2), what is the minimum free area required for the single opening per 3,000 Btu/h of total appliance input rating?

What is the minimum distance required between the lowest edge of a grease filter and an exposed charcoal and charbroil type cooking surface?

Supply air to a swimming pool and associated deck areas shall not be recirculated unless such air is dehumidified to maintain the relative humidity of the area at what percentage or less?

Under what static vent pressure state does a Natural Draft System remove flue or vent gases?

Full-face flange gaskets must be used with all flanges made of which type of material?

Who has the authority to waive the submission of construction documents, calculations, or other data if review is not necessary to determine compliance?

The payment of the fee for work authorized by a permit shall not relieve the applicant or holder of the permit from paying what?

A Dwelling contains not more than how many dwelling units?

What is the required People Outdoor Airflow Rate in the Breathing Zone in CFM/person for a Booking/waiting area in a correctional facility?

For ducts having a static pressure classification of less than 2 inches of water column (500 Pa), additional closure systems are not required for continuously welded joints and seams and locking-type joints and seams, but this exception does not apply to which joint types located outside of conditioned spaces?

For service access, what is the minimum required depth and width of the level working space provided in front of the control side of an appliance?

Appointment of a deputy code official requires the concurrence of the:

If intake openings are located less than 10 feet horizontally from streets, alleys, parking lots, and loading docks, they must be located not less than how many feet vertically above such locations?

The occupant load utilized for the design of a ventilation system shall be not less than the number determined from what source?

Concealed piping is prohibited from being located in solid partitions and solid walls unless installed in:

A primarily vertical structure containing one or more flues, for the purpose of carrying gaseous products of combustion and air from an appliance to the outside atmosphere is a:

A free-standing heating unit used for direct heating of the space in and adjacent to that in which the unit is located is a:

What must masonry chimneys be provided with, and this material must be compatible with the type of appliance connected?

Air being removed from any space, appliance, or piece of equipment and conveyed directly to the atmosphere by means of openings or ducts is known as what?

Where a venting system passes through an above-ceiling air-handling space and joints are installed within that space, the joints must be sealed in accordance with the appliance or vent manufacturer’s instructions, or the venting system must be installed in a sealed conduit or enclosure.

Roof and wall penetrations for solar thermal systems must be flashed and sealed to prevent the entry of water, rodents, and what other pests, in accordance with Section 302?

An unvented heating appliance designed for stationary installation and utilized to provide comfort heating, providing radiant or convection heat directly from the heater without utilizing ducts, is a(an):

Exhaust outlets serving Type II hoods must terminate not less than how many feet in any direction from openings into the building?

What is an assembly of connected ducts, plenums, fittings, registers, grilles and hoods through which air is conducted from the space and exhausted to the outdoor atmosphere?

Hearth extensions of approved factory-built fireplaces must be installed in accordance with the listing and must comply with which UL standard?

Where an appliance equipped with a mechanical forced draft system creates a positive pressure in the venting system, the venting system must be designed for what type of pressure application?

Solid fuel furnaces must be tested in accordance with which UL standard?

Connectors shall connect to a chimney flue at a point not less than how many inches above the lowest portion of the interior of the chimney flue?

A continuous passageway for the transmission of air that, in addition to ducts, includes duct fittings, dampers, plenums, fans and accessory air-handling equipment, is a:

Shutoff valves shall be installed at connections to which type of expansion tank in ground-source loop piping systems?

Each individual radiant tubing circuit must have a tag or label affixed to each manifold outlet to indicate the areas served and what other specific information?

For vertical 3/4-inch steel pipe, how often must supports be spaced?

Alterations such as cuts, notches, and holes bored in trusses or I-joists are prohibited except where permitted by the manufacturer’s recommendations or where the effects are specifically considered in the design of the member by whom?

Liquid fuel vent pipes shall terminate outside buildings not less than what minimum distance from any building opening?

For an appliance connected by rigid metallic pipe, what is the maximum distance the union fitting can be located from the appliance?

An Induced-draft venting system uses a fan or other mechanical means to cause the removal of flue or vent gases under what static vent pressure condition?

What is the minimum thickness required for a chimney connector serving a medium-heat appliance with an equivalent round diameter of 17 inches (Area 202–254 sq in), according to Table 803.9(2)?

What is the capacity in cfh for 1/2-inch nominal semirigid copper tubing at a length of 70 feet, for natural gas at less than 2 psi inlet pressure and 0.3 in. w.c. pressure drop?

An appliance shall not be connected to a chimney flue serving a separate appliance designed to burn which type of fuel?

A combination flashback arrestor and backflow check valve shall be installed at an approved location on both the fuel gas and oxygen supply lines where fuel gas is used with oxygen in which operation?

Underground fuel oil piping systems must be listed and labeled in accordance with which UL standard?

Gaskets and sealing materials used for grease duct-to-exhaust fan connections must be rated for continuous duty at a minimum temperature of what?

If motor vehicles are capable of passing under an appliance in a public garage, the appliance must be installed at least 1 foot (305 mm) higher than what other measurement?

The approval and installation of fuel gas distribution piping, equipment, fuel gas-fired appliances, and their venting systems shall be in accordance with which other code?

A valve installed after the point of delivery to shut off the entire piping system is a:

Remote control of refrigeration compressors, refrigerant pumps, and normally closed, automatic refrigerant valves located in the machinery room must be provided by a clearly identified switch of the break-glass type or with what other device?

Periodic testing is required for which of the following emergency devices and systems?

New mechanical systems and parts of existing systems that have been altered, extended, renovated, or repaired shall be tested as prescribed to disclose what?

That which enables a device, appliance or equipment to be reached by ready access or by a means that first requires the removal or movement of a panel, door, or similar obstruction is defined as:

Where multiple air-handling systems share common supply or return air ducts or plenums, smoke detectors are required if the combined design capacity is greater than what rate?

Exhaust duct terminations for clothes dryers, where the manufacturer’s instructions do not specify a location, shall terminate not less than what minimum distance in any direction from openings into buildings?

Motors driving fans in smoke control systems must have a minimum service factor of what value?

The use of gypsum boards to form plenums is limited to systems where the air temperatures do not exceed what maximum temperature?

Media-type air filters used in non-dwelling units must comply with which UL standard?

Mechanical ventilation shall be provided by a method of supply air and what other air type, except for certain residential occupancies?

Metal chimneys shall be constructed and installed in accordance with which specific NFPA standard?

If outdoor air intake openings front on a street or public way, the 10-foot horizontal distance shall be measured from where?

The air velocity limitations in grease ducts do not apply within transitions used to connect to differently sized or shaped openings, provided such transitions do not exceed what maximum length?

A Push-Fit Joint is a type of mechanical joint consisting of elastomeric seals and what other component?

Furnaces and boilers installed in closets and alcoves must be listed for what specific application?

What type of metallic pipe is strictly prohibited from use in piping systems?

Gas piping is prohibited from being used as which type of electrical component?

Horizontal upper combustion air ducts shall not slope in which direction toward the source of combustion air?

The distance from the centerline of the rungs to the nearest permanent object on the climbing side of the ladder shall be not less than how many inches?

A gas-tight joint obtained by the joining of metal parts in molten state is a:

A floor furnace must be placed so that a door, drapery, or similar object cannot be nearer than what minimum distance to any portion of the register of the furnace?

What is the capacity in thousands of Btu/h for 2-inch nominal Schedule 40 metallic pipe at 500 feet in length, for undiluted propane operating at 10.0 psi inlet pressure with a 3.0 psi pressure drop?

Pumps that are not part of an appliance must be of what specific type?

Duct smoke detectors must report only as a supervisory signal, not as a fire alarm, in facilities required to be monitored by what location?

Rodentproofing construction must be in accordance with the International Building Code for spaces where persons live, sleep, or work, or where what is stored, prepared, processed, served, or sold?

Protective steel shield plates for tubing containing Groups A2, A3, B2, and B3 refrigerants and located in concealed framing spaces must have a minimum thickness of what gauge?

For non-residential occupancies, the maximum opening size in louvers, grilles, and screens protecting air intake openings must be less than or equal to what dimension?

A method of interlock between an exhaust hood system and cooking appliances shall NOT involve or depend on what component?

Nonmetallic pipe utilized for fuel oil systems must conform to which standard listed in Table 1302.3?

A separate grease duct system is NOT required for each Type I hood if all interconnected hoods are located in the same story, the same or adjoining rooms, do not penetrate fire-resistance-rated assemblies, and do not serve what type of appliances?

What type of fluid must be used as the heat transfer fluid in single-wall heat exchangers?

What is the minimum depth required for an auxiliary drain pan?

These regulations, subsequent amendments thereto or any emergency rule or regulation that the administrative authority having jurisdiction has lawfully adopted, is the definition of which term?

For an uninhabited space, if a mechanical exhaust and supply air system is used, the system must be automatically controlled to operate when the relative humidity in the space served exceeds what percentage?

The installation of liquid-fueled stationary internal combustion engines and gas turbines, including exhaust and fuel piping, must meet the requirements of which standard?

Refrigerant piping that penetrates two or more floor/ceiling assemblies shall be enclosed in what structure?

Ventilation rates for occupancies not represented in Table 403.3.1.1 shall be based on a listed occupancy classification most similar in terms of occupant density, activities, and what third factor?

If attics or structural spaces are part of a passive solar system, what is not required if other approved means of controlling condensation are provided?

The code official is authorized to require the owner or owner’s authorized agent to provide what document to determine compliance with this code?

The content of a technical opinion and report shall analyze the properties of the design, operation, or use of the building or premises to identify and propose what?

Vented appliances are generally required to be installed with draft hoods, except for which type of appliance?

High-density polyethylene (HDPE) pipe used for ground-source heat pump ground-loop systems must conform to which specific ASTM standard?

Domestic cooking exhaust equipment with integral downdraft exhaust systems must be listed and labeled in accordance with which standard?

A manually operated solid fuel ignition appliance for installation in a vented solid fuel-burning fireplace is a:

Venting systems are prohibited from extending into or passing through any fabricated air duct or what other air-handling component?

Every steam boiler must have a pressure gauge and what other component?

In coastal high-hazard areas and coastal A zones, mechanical systems and equipment shall not be mounted on or penetrate walls intended to do what under flood loads?

What is the maximum allowable quantity of refrigerant determined by Section 1104 based on?

For exhaust openings that terminate outdoors, the openings in screens, louvers, and grilles must be sized not less than what minimum dimension?

If the code official has obtained a proper inspection warrant, what must the person having charge or control of the structure permit?

At the point where tee or wye fittings connect to a common vent, the opening size of the fitting must be equal to the size of which component?

Gas piping systems constructed entirely of pipe or tubing not meeting the size and length criteria for displacement must have a design operating pressure of what maximum amount to be purged indoors or outdoors?

The point at which a gas-fired appliance connects to the gas piping system is the:

Appliances constructed and installed so that all air for combustion is derived directly from the outdoor atmosphere and all flue gases are discharged directly to the outdoor atmosphere are defined as:

To confirm its objectivity, an approved agency must disclose all possible:

For a Pet shop (animal areas), recirculation of air is prohibited and mechanical exhaust is required based on which Table 403.3.1.1 note?

Joints and piping on the positive pressure side of a power exhauster must be listed for positive pressure applications as specified by what documentation?

The code official shall have the authority to suspend or revoke a permit if it was issued on the basis of incorrect, inaccurate, or what other type of information?

The length of the bonding jumper between the connection to a gas piping system and the connection to a grounding electrode system shall not exceed what maximum length?

Which type of vent is listed and labeled for use with appliances with draft hoods and other Category I appliances that are listed for use with that specific vent type?

Under what condition can the minimum required rate of outdoor air be reduced from the rate determined in Section 403.3?

In each occupiable space, the ventilation system shall be designed to deliver the required rate of outdoor airflow to which specific location?

For an appliance connected to a chimney flue serving a fireplace, what must be provided for access to the flue?

Unfired pressure vessels having a volume of 5 cubic feet or less operating at pressures not exceeding 250 psi (1724 kPa) are exempt if located in all of the following occupancies EXCEPT:

The use of ventilating hoods and exhaust systems to vent appliances is generally limited to industrial appliances and appliances installed in which type of application?

Collectors and separators for dust, stock, and refuse systems must be located on the exterior of the building or structure and not nearer than how many feet to combustible construction or unprotected wall/floor opening?

What is the maximum vertical spacing allowed for supporting Copper or copper-alloy pipe?

What must be provided in an attic passageway to an appliance, which must be not less than 24 inches (610 mm) wide?

Which classification of clothes dryer is used in business with direct intercourse of the function with the public, and is not designed for use in individual family living environment?

Where a connector passes through an unheated space, what type of construction shall the connector NOT be?

Which type of floor furnace is equipped with a fan that provides the primary means for circulating air?

Which type of hood is NOT allowed to be used over extra-heavy-duty cooking appliances?

In accordance with a decision from the board of appeals, the code official shall take action without what?

A location that cannot be accessed without damaging permanent parts of the building structure or finish surface is a:

Above-grade underfloor spaces or basements in LP-gas distribution facilities where portable containers are used or stored must be provided with what?

A record of approvals shall be maintained by the code official and made available for public inspection during business hours in accordance with:

For kitchens in Group R-2, R-3, and R-4 occupancies, what is the required intermittent exhaust rate capacity?

The meter, valve, regulator, piping, fittings and equipment installed by the service gas supplier before the point of delivery is the:

When sizing a single appliance vent where the maximum capacity determined from the tables is used, and an additional elbow up to and including 45 degrees is added, the maximum capacity listed must be reduced by what percentage?

Floor registers shall resist, without structural failure, a concentrated load of how many pounds?

Which of the following piping materials is listed in Table 1107.4 for use as refrigerant pipe?

The required minimum indoor temperature must be maintained at what specific point above the floor on the design heating day?

What electrical requirement must be provided at or near the appliance location in an attic?

Scrubbing tubs, scouring, brushing or spotting operations in dry cleaning plants must be located such that solvent vapors are captured and exhausted by which system?

Mechanical draft systems must be listed and labeled in accordance with which UL standard?

The maximum amount of gas input required per unit of time, usually expressed in cubic feet per hour, or Btu/h, is defined as:

Which of the following details is NOT required to appear on the permanent factory-applied nameplate affixed to appliances?

Duct coverings shall not penetrate a wall or floor required to have what specific characteristic?

The imposition of penalties prescribed shall not preclude the legal officer from instituting appropriate action to prevent unlawful construction or to:

The code official shall keep a record of tests conducted to comply with the requirements for tests used as evidence of compliance and tests required for:

Cross-linked polyethylene/aluminum/cross-linked polyethylene (PEX-AL-PEX) pressure pipe must conform to which ASTM standard?

In a Retail store, sales floor, or showroom, what is the required Exhaust Airflow Rate in CFM/ft squared for Dressing rooms?

Protective shield plates must be placed where there is less than what minimum distance between the clothes dryer exhaust duct and the finished face of the framing member?

What is the maximum overall length permitted for a listed appliance fuel connector?

Where a closet is designed for a clothes dryer, what is the minimum area required for the opening in the closet enclosure for makeup air?

What must Type L vents terminate with?

Where must mechanical fasteners penetrate when installing radiant heating panels on wood or steel framing?

Where two bottom blowoff valves are provided, consisting of one quick-opening valve and one slow-opening valve in series, which valve must be installed closest to the boiler?

For a round galvanized steel duct with a diameter of 18 inches operating at 1-inch water gauge static pressure in a single dwelling unit, what is the minimum sheet metal thickness required?

A Type B-W gas vent shall terminate not less than what minimum vertical height above the bottom of the wall furnace?

The purpose of a Transition Fitting, Plastic to Steel, is to provide what type of connection between the two materials?

What is the approximate length of the threaded portion required to be cut for a 1 1/4-inch iron pipe size?

Air intake openings on structures in flood hazard areas must be located at or above the elevation required by which section of the International Building Code?

Where an additional appliance is to be served by an existing piping system, what must be done if the existing system is determined to be inadequate?

For smoke control systems using the exhaust method in large enclosed volumes, the height of the lowest horizontal surface of the accumulating smoke layer must be maintained not less than how many feet above any walking surface that forms a portion of a required egress system?

In industrial occupancies and refrigerated rooms, where a machinery room would otherwise be required, refrigerant detectors are not required in unoccupied areas that contain only what type of piping?

Screws, rivets and other fasteners are prohibited from penetrating the inner wall of double-wall gas vents, except at the transition from an appliance draft hood outlet, flue collar or what other component?

Underground inspection shall be made after trenches or ditches are excavated and bedded, piping installed, and before what action is taken?

For an appliance to be classified as Vented, how are the products of combustion conveyed to the outdoor atmosphere?

What is the minimum clearance required above an appliance where the original required clearance was 12 inches, and the protection is 0.024-inch sheet metal with ventilated airspace over 0.024-inch sheet metal with ventilated airspace?

Motorized louvers must be interlocked with the appliance to ensure they are proven to be in the full open position prior to:

What is the minimum weight of steel pipe required for Group A2, A3, B2, and B3 refrigerants for sizes 1 1/2 inches or less in diameter?

A permit issued by the code official for temporary uses, equipment, and systems shall not be permitted for more than how many days?

Which of the following is prohibited when taking return air from a crawl space?

What is the minimum exhaust distance required for air discharged from mechanical ventilation systems from a property line or openings into buildings?

In all clearance reduction systems using a ventilated airspace, what is the minimum air gap required between the clearance reduction system and combustible walls and ceilings?

Which regulator reduces gas pressure from the range of greater than 0.5 psig (3.4 kPa) and less than or equal to 5 psig (34.5 kPa) to a lower pressure?

Where one chimney flue serves gas appliances and liquid fuel-burning appliances, and two or more openings are provided into the flue, they must be located at different:

Solar thermal system components containing pressurized fluids must be protected against pressures and temperatures exceeding design limitations using what devices?

This code shall not require changes to the construction documents or construction of a structure for which a lawful permit was issued, provided the construction was pursued in good faith within how many days after the effective date of this code?

If roof-mounted solar collectors also serve as a roof covering, they must conform to the requirements for roof coverings in accordance with which code?

Factory-built chimneys for building heating appliances producing flue gases having a temperature not greater than 1,000°F must be listed and labeled in accordance with which UL standard?

Log lighters shall be listed in accordance with which standard?

What is the minimum clearance required from combustible materials for ducts serving commercial clothes dryers?

A vertical pipe supplying fuel gas is defined as a:

The code official is authorized and directed to perform which primary action regarding the provisions of this code?

Mechanical systems shall be tested as required in this code and observed by whom?

Potable water supplies to solar systems must be protected against contamination in accordance with which code?

What is the capacity in cfh for 1-inch nominal Schedule 40 metallic pipe at 500 feet in length, operating at 5.0 psi inlet pressure with a 3.5 psi pressure drop?

The opening in a cap, spud or other device whereby the flow of gas is limited and through which the gas is discharged to the burner is the:

Who shall defend any suit or criminal complaint instituted against an officer or employee acting in the lawful discharge of duties under this code?

An appliance used to reduce combustible refuse material to ashes and that is manufactured, sold and installed as a complete unit is an:

What is the capacity in cfh for 3-inch nominal O.D. Polyethylene plastic pipe (SDR 11) at 100 feet in length, operating at less than 2 psi inlet pressure with a 0.5 in. w.c. pressure drop?

In areas designated as Zone AO where a depth number is not specified on the flood hazard map, the depth number used for the Design Flood Elevation shall be taken as equal to what value?

What is the minimum clearance required to a mechanical air supply inlet (Clearance I) for a vent terminal?

For appliance shutoff valves located at a manifold, what is the maximum distance allowed between the manifold and the appliance served?

Steam piping must be installed to drain to the boiler or what other system component?

Water supply and discharge connections associated with refrigeration systems must be made in accordance with this code and which other specific code?

What is the minimum height required for a cleanout opening in a masonry chimney flue?

Joints between polyethylene plastic pipe and tubing for ground-source heat pump loop systems must be heat-fusion joints, electrofusion joints, or what third type of joint?

When granting modifications due to practical difficulties, the code official must first find that the modification does not lessen which requirement?

Mechanical ventilation for indoor storage areas exceeding maximum allowable quantities shall be provided at a rate of not less than how many CFM per square foot of floor area?

If the lower 6-inch portion of a floor furnace is sealed by the manufacturer to prevent the entrance of water, what is the minimum clearance required from grade level?

For Group A2L and B2L refrigerant detectors, if the concentration is less than or equal to the refrigerant concentration level (RCL), the alarm reset must be what type?

When replacing an existing heating appliance serving an occupied portion of a structure, a request for inspection must be filed with the department within how many hours after replacement work is completed to avoid prohibiting the operation of the appliance?

Nonrecirculating direct-fired industrial air heaters shall be listed to which standard?

Ducts shall not be installed in or within what minimum distance of the earth, unless they comply with Section 603.8 (Underground Ducts)?

A manually operated valve in the gas line for the purpose of completely turning on or shutting off the gas supply to the appliance, except to pilot(s) provided with independent shutoff, is a(an):

A plastic water heater pan material must have a flame spread index of not more than 25 and a smoke-developed index of not more than what value when tested in accordance with ASTM E84 or UL 723?

What is a pipe that connects a fuel-burning appliance to a chimney?

A single booster-type automatic instantaneous water heater used solely for sanitizing rinse in a commercial kitchen must have its draft hood outlet located not less than 36 inches vertically and what minimum distance horizontally from any surface other than the heater?

The interlock requirement for dampers in combustion air openings serves to prevent operation of any appliance that draws combustion air from the room or space when what condition is true?

In a Private dwelling, single and multiple, if the exhaust system for a Toilet room operates intermittently, what is the required exhaust rate in CFM?

What is the minimum clearance required above an appliance where the original required clearance was 36 inches, and the protection utilized is 1/2-inch insulation board over 1-inch glass fiber or mineral wool batts?

An air dispersion system is a diffuser system designed to convey air and diffuse air into a space while operating under what pressure characteristic?

Guards shall be provided where components requiring service are located within what distance of a roof edge or open side of a walking surface located more than 30 inches above the surface below?

The person to whom an annual permit is issued shall keep a detailed record of alterations made under such permit that shall be accessible to the code official at all times or:

Threads used for threaded joints in hydronic piping systems must conform to which ASME standard?

What is defined as a single unit providing complete, independent living facilities, including permanent provisions for living, sleeping, eating, cooking and sanitation?

What is the exception for the minimum average air velocity into an open face or open front spray booth using fixed or automated electrostatic spray application equipment?

Each exhaust outlet located within a hood shall serve not more than what maximum linear length of hood?

Where are manual dampers prohibited from being installed in connectors?

What type of hazardous production materials (HPM) are allowed to have their gas cabinet ventilation system connected to a workstation ventilation system?

A Smoke Damper is installed to operate automatically, controlled by what system?

Which type of chimney is composed of factory-made components, assembled in the field in accordance with the manufacturer’s instructions?

Soft annealed copper tubing larger than what outside diameter shall not be used for field-assembled refrigerant piping unless it is protected from mechanical damage?

Vents for Category II and III appliances shall be tested in accordance with which UL standard?

Approved smoke and heat vents must be installed in the roofs of one-story buildings where required by which code?

Connectors shall connect to a masonry chimney flue at a point not less than what vertical distance above the lowest portion of the interior of the chimney flue?

What is the minimum clearance required from the grade level to the lowest portion of a floor furnace?

Where grease duct enclosures are not required, what is the minimum clearance required from combustible construction for Type I hood grease duct systems?

Piping and components subject to manual gravity draining in drain-back systems must maintain a horizontal slope in the direction of flow of not less than what minimum value?

Mechanical ventilation for ambulatory care facilities and Group I-2 occupancies shall be designed and installed in accordance with this code, NFPA 99, and which other standard?

Where the scope of a referenced standard includes subject matter also within the scope of this code, the provisions of this code shall:

When entering an occupied structure or premises for inspection, the code official must first present credentials to the occupant and do what?

Sauna heaters must be equipped with a thermostat that will limit room temperature to what maximum temperature?

How is an Unvented Alcohol Fuel-Burning Decorative Appliance intended to be secured?

What is a Pressure-Limiting Device designed to stop automatically?

Power exhausters serving automatically fired appliances must be electrically connected to each appliance to prevent appliance operation when the power exhauster is not operating. This is referred to as what type of connection?

Low-pressure boilers operate at pressures less than or equal to 15 pounds per square inch (psi) (103 kPa) for which medium?

Where solar thermal equipment is exposed to vehicular traffic, what is the minimum height it must be installed above the finished floor?

With the exception of smoking lounges, the ventilation rates in Table 403.3.1.1 are based on the absence of what in occupiable spaces?

Hangers and anchors for piping support must be attached to the building construction in what manner?

In a Plastic Adhesive Joint, the adhesive substance forms a continuous bond between mating surfaces without doing what to either surface?

Equipment and appliances installed at grade level shall be supported on a level concrete slab or other approved material extending not less than how many inches above adjoining grade?

Fuel-burning appliances and fireplaces in Group I-2, Condition 2 occupancies must be in accordance with which section?

The working pressure rating of solar system components must be not less than what specific pressure?

When granting a modification due to practical difficulties, the code official must ensure the modification does not lessen which requirement?

For the purposes of this code, if a word is used in the present tense, it includes which other tense?

The cutting and notching of holes in cold-formed steel framing members designated as structural members shall be in accordance with which standard?

Requirements necessary for the strength, stability, or proper operation of a mechanical system not specifically covered by this code shall be determined by whom?

Which of the following conditions permits the use of the space between the corridor ceiling and the floor or roof structure above as a return air plenum?

Constituents resulting from the combustion of a fuel with the oxygen of the air, including inert gases, but excluding excess air, are defined as:

Gas composed predominately of propane, propylene, butanes or butylenes, or mixtures thereof that is gaseous under normal atmospheric conditions, but is capable of being liquefied under moderate pressure at normal temperatures, is defined as:

Freeze protection for system components must be provided in accordance with which standard?

A Bathroom is defined as a room containing a water closet and which other fixture?

What is the minimum length (in feet) of nominal 2 1/2-inch piping that, when removed from service, must have its residual fuel gas displaced with an inert gas?

Plastic fire sprinkler piping exposed within a plenum shall be used only in which type of fire suppression system?

Which ASTM standard applies to Chlorinated polyvinyl chloride/aluminum/chlorinated polyvinyl chloride (CPVC/AL/CPVC) plastic pipe?

What specific type of gauge is prohibited on a fuel oil tank if, when broken, it would permit the escape of oil?

A self-contained vented appliance designed for incorporation in or permanent attachment to the structure, furnishing heated air circulated by gravity or by a fan directly into the space, excluding floor furnaces, unit heaters and central furnaces, is a:

Valves in hydronic piping systems must be constructed of materials compatible with the piping material and fluids, and rated for what two system characteristics?

Connecting offices, waiting rooms, ticket booths, and similar uses accessory to a public garage must be maintained at what specific pressure condition?

Outdoor air inlets serving the residential portion of a building must be covered with a screen having what maximum size openings?

Commercial electric cooking appliances must be listed and labeled in accordance with which UL standard?

The board of appeals shall not have the authority to:

What is the capacity in thousands of Btu/h for 4-inch nominal Schedule 40 metallic pipe at 1,500 feet in length, for undiluted propane operating at 2.0 psi inlet pressure with a 1.0 psi pressure drop?

Upon activation, smoke detectors in air distribution systems shall shut down all operational capabilities of the system in accordance with what criteria?

The term House Piping is defined as:

What is the maximum horizontal length allowed for a single-wall connector?

Which appliance type is classified as a Light-Duty Cooking Appliance?

Ignition of gas at the burner(s) when the gas controlling device is turned on, including reignition if the flames have been extinguished by means other than by the closing of the gas controlling device, is defined as:

Semirigid conduit of copper, copper-alloy aluminum, plastic or steel is defined as:

The greater of the following two areas: the area within a floodplain subject to a 1 percent or greater chance of flooding in any given year, or the area designated as a flood hazard area on a community’s flood hazard map, is the definition of:

When using Type B double-wall gas vent connected by a single-wall metal connector to a single Category I appliance, if the vent height (H) is 20 feet, the lateral (L) is 20 feet, and the vent diameter (D) is 12 inches, what is the maximum input rating (NAT Max) for a Natural Draft appliance?

Openings into fire-resistance-rated construction for exit enclosure ventilation systems shall be limited to those needed for maintenance and operation and protected by what?

Return air openings shall not be located less than what minimum distance from an open combustion chamber or draft hood of another appliance in the same room?

Openings through concrete or masonry building elements for pipe penetrations must be protected by what?

Where conflicts occur between this code and the conditions of listing or manufacturer’s instructions, which provisions shall generally apply?

Requirements for gas appliances and related accessories must include installation, venting, connections to piping systems, and:

Pellet fuel-burning appliances must be listed and labeled in accordance with which standard?

For electrofusion joints, joint surfaces must be clean and free from moisture, and scoured to expose what material?

Where must cleanouts serving horizontal sections of grease ducts be located if other locations are not available?

If an appliance creates a positive pressure in the venting system using a forced or induced draft system, the venting system must be designed and listed for what specific application?

Mechanical gauges used to measure test pressures shall have a range such that the highest end of the scale is not greater than what multiple of the test pressure?

The entire length of a vent connector must be provided with what type of access for inspection, cleaning and replacement?

Means for interrupting the electrical supply to an air-conditioning appliance and its remote cooling tower must be provided within sight of and not over what maximum distance from the equipment?

To determine compliance with this code, the code official is authorized to require the owner or owner’s authorized agent to provide a:

Minor alterations to existing mechanical systems shall meet the provisions for new construction unless the work is done in the same manner as the existing system, is not hazardous, and is what?

Chimneys shall extend not less than what minimum vertical distance above the highest connected appliance draft hood outlet or flue collar?

According to Table 509.8, what is the minimum nominal thickness required for a duct diameter of 19–30 inches conveying abrasive materials?

What is the approximate length of the threaded portion required to be cut for a 1-inch iron pipe size pipe?

After an installation has been ordered disconnected by the code official, a person may not make energy source connections until who authorizes the reconnection and use of the installation?

A balanced damper device attached to a chimney, vent connector, breeching or flue gas manifold to protect combustion appliances by controlling chimney draft is known as a:

Air in excess of that required by Section 403.3 shall not be prohibited from being recirculated as a component of supply air, except under which condition?

Where an oil-fired appliance is connected to an existing masonry chimney, the chimney flue shall be repaired or relined in accordance with which standard?

What are prohibited from being exhausted through the same hazardous exhaust system?

If different provisions specify different methods of construction in a specific case, which requirement shall govern?

Disconnection of utility service is authorized by the code official in case of emergency where necessary to eliminate which condition?

Ducts for domestic cooking exhaust equipment must be constructed of sheet metal and equipped with what flow control device?

Reduced clearance protective assemblies, including structural and support elements, must be constructed of what type of material?

Boilers shall be mounted on floors of noncombustible construction, unless what condition is met?

The minimum distance through air measured between the heat-producing surface of the mechanical appliance, device or equipment and the surface of the combustible material or assembly is defined as:

What is the capacity in cfh for 1 1/4-inch nominal semirigid copper tubing at 200 feet in length, operating at less than 2 psi inlet pressure with a 1.0 in. w.c. pressure drop?

Flexible air connectors are prohibited from passing through which building elements?

A Floor Furnace takes air for combustion from where?

What must be provided for existing chimneys and vents in accordance with the International Building Code?

The code official is authorized to accept reports of approved agencies, provided such agencies satisfy the requirements as to qualifications and what other factor?

Exhaust ducts under positive pressure, chimneys, and vents are prohibited from extending into or passing through which other duct components?

An enclosed portion of the building structure that is designed to allow air movement and serve as part of an air distribution system is defined as a Plenum, provided it is not what?

Which method defines a Low-Probability Pump designed to prevent atmospheric release of the pumped fluid?

A valve in a line shall not be subjected to the test pressure unless it can be determined that the valve, including the valve-closing mechanism, is designed to safely withstand the test pressure.

A permanently mounted, manually operated device that provides the means for connecting and disconnecting an appliance to the supply piping, and is designed so that disconnection only occurs when the manually operated valve is in the closed position, is a:

When two or more appliances are connected, what is the maximum horizontal length permitted for a 7-inch diameter connector?

Vent outlets for purging gaseous hydrogen systems shall be located at least what minimum distance from building openings and lot lines of properties that can be built on?

Vented wall furnaces shall be located so that a door cannot swing within what minimum distance of an air inlet or air outlet of such furnace, measured at right angles to the opening?

A Type L vent is listed and labeled for use with oil-burning appliances and which type of gas-fired appliances?

Where must the exhaust from stationary local contaminant sources discharge?

Which of the following appliances is not required to be vented?

When two or more connectors enter a common vent or chimney, where shall the smaller connector enter?

For electrical equipment and appliances, the required label information must include the electrical rating in volts, amperes, and motor phase, and what other essential rating?

For a hydrostatic leak test of a gaseous hydrogen system, what is the minimum required test pressure?

In System D for combustible wall pass-through, what is the required minimum clearance to combustibles?

External duct insulation, except spray polyurethane foam, must be legibly printed or identified at intervals not greater than what maximum distance?

What is the minimum clearance required from combustible construction for a Type I hood?

What are the specified materials for Tubing, as defined in Piping?

In concealed locations, protective steel shield plates for vents installed through holes or notches in framing members must have a minimum thickness of 0.0575 inch, which corresponds to what gauge?

Energy recovery ventilation systems shall not be used in commercial kitchen exhaust systems serving which type of hood?

When are permit applications for appliance and equipment replacements and repairs required to be submitted if the work was performed in an emergency situation?

An appliance designed or installed in such a manner that the products of combustion are not conveyed by a vent or chimney directly to the outside atmosphere is a(an):

Where are fuel oil test wells strictly prohibited from being installed?

A Pollution-Control Unit (PCU) is manufactured equipment installed in a grease exhaust duct system for the purpose of extracting smoke, grease particles and what other contaminants?

Masonry chimneys used to vent fuel-fired appliances shall be located, constructed and sized as specified in what documentation?

Condensate drains shall not discharge into a plumbing fixture other than a floor sink, floor drain, trench drain, mop sink, hub drain, standpipe, utility sink or which other sink type?

Refrigeration systems using a refrigerant other than ammonia must comply with Chapter 11, the International Fire Code, and which specific ASHRAE standard?

Grease ducts must be constructed of steel having a minimum thickness of 0.0575 inch (1.463 mm) (No. 16 gage) or stainless steel not less than what minimum thickness?

What is the minimum clearance required from the sides and rear of an appliance where the original required clearance was 9 inches, and the protection is 3 1/2-inch-thick masonry wall with ventilated airspace?

The loss in pressure due to friction or obstruction in pipes, valves, fittings, regulators and burners is defined as:

What must be provided to solar thermal equipment for maintenance purposes?

For ozone cabinets, what is the minimum average ventilation velocity required at makeup air openings with the cabinet doors closed?

What is the Zone Air Distribution Effectiveness for a configuration with Ceiling supply of warm air and ceiling return?

Which type of system is exempt from the requirement for an expansion tank in a hot water system?

In which specific occupancy and condition are solid fuel-burning fireplaces and appliances prohibited?

For “other product-conveying outlets,” what is the minimum termination distance from exterior walls and roofs?

Unvented room heaters shall not have an input rating in excess of what maximum amount?

The vent termination point for a horizontal mechanical draft system shall not be located closer than what minimum distance to an interior corner formed by two perpendicular walls?

Plastic plumbing piping and tubing within plenums must have a flame spread index not greater than 25 and a smoke-developed index not greater than 50 when tested in accordance with which standard?

Which type of temperature relief valve automatically opens a relief vent at a predetermined temperature and must be manually returned to the closed position?

Which of the following is an example of work for which a permit is not required?

Nonrecirculating direct-fired industrial air heaters shall not be used to supply any area containing what type of room?

Every boiler or modular boiler must have a shutoff valve in which two piping components?

For undiluted propane calculations using the equation factors listed, what is the value designated as Cr?

A condition where thermal energy is not transferred from a solar thermal collector by means of the flow of a heat transfer fluid is known as what?

During the brazing operation, the inert gas supply must be maintained through the piping at a minimum pressure of 1.0 psi (6.89 kPa) and what maximum pressure?

What is the minimum exhaust rate per lamp for xenon motion picture projectors without an exhaust connection?

Liquid adhesive coatings used on air filters must have a flash point not lower than what minimum temperature?

Food-grade fluid used as a heat transfer fluid containing additives must be third-party listed by an approved agency to the appropriate section of which regulations?

Where must the permit or a copy be kept until the completion of the project?

Which commercial appliances are an exception to the general requirement to discharge products of combustion to a vent, factory-built chimney, or masonry chimney?

What is the required Exhaust Airflow Rate in CFM/ft squared for a Wood/metal shop in an education facility?

A sediment trap must be installed downstream of the appliance shutoff valve as close to the inlet of the appliance as practical, except for which common appliance?

A Ceiling Radiation Damper is a listed device installed in a ceiling membrane of a fire-resistance-rated assembly to automatically limit what?

For a chimney serving low-heat appliances (1,000°F normal operation), what is the minimum required clearance to combustible construction for interior installation?

Solar thermal equipment and appliances must conform to the requirements of Chapter 14 and which specific standard?

For structures located in flood hazard areas, appliances, equipment, and system installations must be located at or above the elevation required by which section of the International Building Code?

The code official shall have the authority to authorize temporary connection of a system to a utility for what purpose?

What is the minimum diameter for a Large-Diameter Ceiling Fan?

It shall be unlawful for a person to erect, construct, alter, repair, remove, demolish or utilize an installation in conflict with or in violation of:

What is the function of an Evaporator in a refrigeration system?

A pressure relief valve installed on the low-pressure side of a hydronic piping system (where pressure has been reduced) must be set at what pressure?

A pressure regulator set in series with another pressure regulator for the purpose of preventing an overpressure in the downstream piping system is a:

Solid fuel-burning appliances must be provided with combustion air in accordance with what documentation?

What must the code official carry when inspecting structures or premises in the performance of duties under this code?

What nominal pipe size requires displacement with an inert gas for any length of piping removed from service?

Lead pipe requires continuous support in the horizontal direction and what maximum spacing in the vertical direction?

Flue lining systems for Category I appliances shall include flue lining systems complying with Section 501.12 or chimney lining systems listed and labeled for use with Type B vents.

From which of the following spaces shall return air for heating or air-conditioning systems NOT be taken?

What identification must each length of pipe and tubing and each pipe fitting utilized in a mechanical system bear?

The operating mechanism for natural ventilation openings shall be provided with ready access so that the openings are readily controllable by whom?

Liquid combustion byproducts of condensing appliances must be discharged to an approved plumbing fixture or disposal area in accordance with whose instructions?

If an alternative material, design, or method of construction is not approved, the code official shall respond in writing stating what?

Evaporative cooling equipment must be installed on level platforms in accordance with which section of this code?

Where piping passes through concrete or masonry walls, what must be provided for protection?

Any location considered to be a fire hazard for flammable vapors, dust, combustible fibers or other highly combustible substances is defined as what?

What is the equivalent length reduction for a 4-inch radius mitered 90-degree elbow in a domestic dryer exhaust duct?

An alternative material, design, or method of construction must comply with the what of the provisions of this code?

Which term refers to the means that first requires the removal or movement of a panel or similar obstruction to reach a device or equipment?

If a term is not defined through the authorized methods, what meaning shall it have?

If a request for an alternative material or design is not approved, how shall the code official respond?

Where is nonmetallic fuel oil pipe permitted to be installed?

When vents pass through insulated assemblies, what must be installed to provide clearance between the vent and the insulation material?

In an attic, what are the minimum clear access opening dimensions required to allow removal of the largest appliance?

What test medium is prohibited from use when pressure testing gas piping systems?

What is the maximum diameter allowed for a chimney connector for a domestic-type appliance that passes through a wall constructed of combustible material using one of the methods in Table 803.10.4?

The point of discharge of condensate drains must be located within the same occupancy, tenant space, or dwelling unit as the source of the condensate, except where discharging to what location?

Where must the midpoint of the water-gauge glass be installed on a steam boiler?

An automatic shutoff valve installed in the gas supply piping that shuts off when unsafe conditions occur and remains closed until manually reopened is a(an):

An automatic valve that opens and closes a relief vent, depending on whether the pressure is above or below a predetermined value, is a:

What is the capacity in cfh for 1 1/2-inch nominal Schedule 40 metallic pipe at 900 feet in length, operating at 2.0 psi inlet pressure with a 1.0 psi pressure drop?

For residential-type appliances, if not installed in unconditioned areas, a vent connector made of aluminum (1100 or 3003 alloy) sheet must be not less than what minimum thickness?

A self-contained appliance for supplying steam or hot water is defined as a:

What is the minimum required clearance from the top of a high-pressure steam boiler with steam generating capacity not exceeding 5,000 pounds per hour to the ceiling?

Protective steel shield plates must extend not less than how many inches above sole plates and below top plates?

Vent caps for liquid fuel vent pipes shall not employ screens finer than what mesh size?

Where a device having an open flame or surface temperature greater than 800°F (427°C) is used in a room containing more than 6.6 pounds (3 kg) of refrigerant in a single independent circuit, what must be provided?

The action of a control from its maximum to minimum position in either predetermined steps or increments of movement as caused by its actuating medium is defined as:

Hydrogen-generating and refueling appliances must be installed and located in accordance with their listing and what other documentation?

Appliances, equipment, and systems regulated by this code are prohibited from being located in which area?

If a metal ventilating hood is installed above a cooking top to reduce vertical clearance to 24 inches, the hood must be constructed of sheet metal not less than what minimum thickness?

Taking return air from a kitchen is permitted if the return air openings serve the kitchen and are located not less than how far from the cooking appliances?

In the absence of recognized test standards, who shall approve the testing procedures?

What is the minimum required thickness for protective steel shield plates?

A listed smoke damper designed to resist the passage of smoke must be provided at each point a duct or air transfer opening penetrates which two types of building assemblies?

Appliances equipped with draft hoods or atmospheric burners shall not be located in the same room or space containing a Type I or Type II hood unless the appliance is located in what?

What is the minimum clearance required on the control side of a floor furnace?

The connection of solid fuel appliances to chimney flues serving fireplaces must comply with which two specific sections?

How shall articles being sprayed be positioned within a spray booth?

For an MP regulator located indoors, what device must be equipped if the regulator is not vented to the outdoors?

What is the maximum length of overlap allowed for overlapping grease duct joints?

A ventilating hood shall be provided above a domestic open-top broiler unit, and a minimum clearance of what distance shall be maintained between the cooking top and combustible material above the hood?

An appliance shall not be connected to a flue serving a factory-built fireplace unless the appliance is specifically listed for such installation.

Where 150-pound pressure-rated steel flanges are bolted to Class 125 cast-iron flanges, which feature of the steel flange must be removed?

What is the maximum height above grade plane for Group R-2, R-3, and R-4 occupancies that must be provided with outdoor air and local exhaust in accordance with Section 403.3.2?

For Group A2L and B2L refrigerant detectors, at a concentration less than or equal to the OEL, what is the maximum required response time in seconds to signal an alarm?

The underground inspection shall be made after trenches or ditches are excavated and bedded, and piping is installed, but prior to:

What is the maximum capacity in cubic feet per hour (cfh) for 1 1/4-inch nominal Schedule 40 metallic pipe at a length of 50 feet, for natural gas at less than 2 psi inlet pressure and 0.3 in. w.c. pressure drop?

When are exhaust fans serving separate dwelling or sleeping units permitted to be connected to a common duct or shaft?

A relief device must be located so that a section of the pressurized system cannot be valved off or otherwise isolated from what component?

When connecting an appliance to an existing chimney or vent, the flue gas passageway must be free from obstructions, combustible deposits, and must be cleaned if previously used for venting what type of appliance?

Products of combustion from appliances plus excess air plus dilution air in the vent connector, gas vent or chimney above the draft hood or draft regulator are defined as:

Appliances shall not be located in a hazardous location unless they are listed and approved for the:

Which components are generally exempt from field testing requirements for refrigeration piping systems?

High-probability equipment using Group A2L, A2, A3, or B1 refrigerant must comply with UL 484, UL/CSA 60335-2-40, or which other standard?

A Limit Control is a device responsive to changes in pressure, temperature, or what other factor, for turning on, shutting off, or throttling the gas supply to an appliance?

Where any cooking appliance under a single hood requires a Type I hood, what type of hood must be installed?

What does a notice of violation or order issued by the code official direct the responsible person to do?

Piping installed downstream of the point of delivery is prohibited from extending through any townhouse unit other than:

For appliances located in attics, the required unobstructed passageway must be not less than 30 inches high and 22 inches wide and not more than what length measured along the centerline?

What is defined as the rapid oxidation of fuel accompanied by the production of heat or heat and light?

Equipment and appliances installed at grade level must be supported on a level concrete slab or other approved material extending not less than what distance above adjoining grade?

In indirect solar thermal hot water heating systems, what is prohibited from being connected to the solar heating loop?

What is the estimated maximum occupant load rate per 1,000 square feet for a General examination room in an outpatient healthcare facility?

A permit is not required for a self-contained refrigeration system provided it contains no more than 10 pounds (4.5 kg) of refrigerant or is actuated by motors of what maximum size?

Catwalks installed to provide required access shall be not less than what minimum width?

Where is a Double Island Canopy Hood placed?

Solar thermal systems are intended to utilize solar energy for which purposes?

What is the minimum finished dimension required for a cleanout opening located at the base of the shaft in a common multistory duct system for clothes dryers?

When testing at a pressure greater than 100 psig (689.5 kPa gauge), the testing gauge must have increments of what maximum amount?

Joints between steel pipe or fittings are required to be mechanical joints made with an approved elastomeric seal, or which two other types of joints?

Appliances such as coffee brewers and coffee urns, food and dish warmers, hot plates, griddles, and waffle bakers designed for installation on or in a counter are defined as:

An existing chimney flue liner, inner wall, or vent inner wall must be continuous and free of cracks, gaps, perforations or other damage that would allow the escape of combustion products, including gases, moisture and:

For compensating hoods with makeup air supplied only from the front face discharge and side face discharge openings, what labeling information is NOT required?

Hot water storage tanks must be insulated with an R-value of not less than what minimum value?

In a Brazed Joint, the metallic mixtures or alloys used to join metal parts must melt at a temperature above what threshold?

A nonadjustable device built into an appliance, or made as part of the vent connector from an appliance, that is designed to provide for ready escape of flue gases in the event of no draft, backdraft, or stoppage is a:

Where the exhaust duct equivalent length exceeds 35 feet (10 668 mm), where must the permanent label or tag identifying the length be located?

A completely self-contained furnace suspended from the floor of the space being heated, taking air for combustion from outside such space and with means for observing flames and lighting the appliance from such space, is a:

What is the minimum slope required toward the hood or a grease reservoir for grease duct systems serving a Type I hood?

Mechanical systems shall not be located in which specific building element?

Type I hoods must be constructed of steel having a minimum thickness of 0.0466 inch (1.181 mm) (No. 18 gage) or stainless steel not less than what minimum thickness?

An appliance shall not be connected to a flue serving a factory-built fireplace unless what condition is met?

Large mercantile occupancy is defined as premises where more than how many persons congregate on levels above or below street level to purchase personal merchandise?

Fireplace stoves must be tested in accordance with which UL standard?

What is the minimum thickness required for galvanized steel vent connectors?

A ventilation opening into a sauna room shall be provided, and the opening must be not less than what minimum size?

Noncanopy-type hoods shall be located not greater than how many feet above the cooking surface?

A device or group of devices essentially forming an integral unit for the final conveyance of gas or a mixture of gas and air to the combustion zone, and on which combustion takes place to accomplish the function for which the appliance is designed, is a:

What is strictly prohibited from being installed in a machinery room if they use combustion air from the room?

Used refrigerants shall not be reused in a different owner’s equipment unless tested and found to meet the purity requirements of which AHRI standard?

An installation of pipe, valves or fittings installed on a premises or in a building and utilized to convey fuel gas is defined as:

Draft hoods and barometric draft regulators must be installed in the same room or enclosure as the appliance in such a manner as to prevent any difference in pressure between the hood or regulator and which system?

What is the minimum required thickness (in inches) for a galvanized steel vent connector with a diameter of 15 inches, serving a low-heat appliance?

For structures located in flood hazard areas, plenum spaces located below the required elevation must be capable of resisting what loads and stresses?

For permanent ladders installed to provide roof access, what is the maximum spacing allowed for rungs on center?

The code official is authorized to accept reports of approved agencies provided such agencies satisfy the requirements for qualifications and:

Where refrigerants of Groups A2, A3, B2, and B3 are used, the machinery room must conform to what hazardous location classification requirements of NFPA 70?

Threaded fittings in metallic piping systems shall not be used in sizes larger than what dimension?

For permanent ladders installed to provide roof access, the side railing shall extend above the parapet or roof edge not less than what minimum height?

A through-the-wall direct-vent terminal serves an appliance rated at 40,000 Btu/h. What is the minimum clearance required to an openable window (Clearance B)?

Who is authorized to make or require other inspections of construction work to ascertain compliance with the provisions of this code?

What documentation must an approved testing laboratory provide when a product is Third-Party Tested?

What is the minimum exhaust rate per lamp for electric arc motion picture projectors without an exhaust connection?

Which type of vent is listed and labeled for use with wall furnaces?

Copper and copper alloy pipe shall not be used if the gas contains more than what average amount of hydrogen sulfide per 100 standard cubic feet of gas?

What is the primary function of the code compliance agency?

A manually or automatically controlled device to regulate draft or the rate of flow of air or combustion gases is a:

For ducts conveying explosive or flammable vapors, fumes or dusts, what is the minimum termination distance from combustible walls and operable openings into buildings that are in the direction of the exhaust discharge?

An agency seeking approval must disclose all possible conflicts of interest to confirm its what?

An operation performed to verify the gastight integrity of gas piping following its installation or modification is a:

Which term is NOT an alternate name for a backshelf hood?

If horizontal grease ducts exceed 75 feet (22 860 mm) in length, what is the minimum required slope?

Who regulates additions, alterations, renovations, or repairs related to building or structural issues in existing buildings?

What is the maximum temperature for hot water furnished by a Low-Pressure Hot-Water-Heating Boiler?

Pipe and duct insulation contained within plenums must have a flame spread index of not more than 25 and a smoke-developed index of not more than 50 when tested in accordance with which mounting procedures?

Appliances serving different areas of a building than where they are installed must be permanently marked in an approved manner that uniquely identifies the appliance and what else?

A draft hood supplied with or forming a part of a listed vented appliance must be installed without alteration, exactly as furnished and specified by the appliance manufacturer.

The amount of supply air in a mechanical ventilation system shall be approximately equal to the amount of what other air component?

An occupant or person having charge of a premises shall not fail or neglect to permit entry by the code official if the code official has first obtained a:

Where must manufacturer’s installation instructions be available at the time of inspection?

Guards are required where components that require service are located within 10 feet (3048 mm) of a roof edge and that edge is located more than how many inches above the floor, roof, or grade below?

Masonry chimneys without the required airspace clearances are permitted to be used if lined or relined with a chimney lining system listed for use in chimneys with reduced clearances in accordance with which UL standard?

An appliance designed and installed in such a manner that all of the products of combustion are conveyed directly from the appliance to the outdoor atmosphere through an approved chimney or vent system is a(an):

Where chemicals that generate corrosive or flammable products are routinely used, fired appliances where these chemicals can enter combustion air shall be located in a mechanical room that is partitioned off and provided with combustion air from:

Every hot water boiler must have which two gauges, or a combination gauge?

A water-level detection device conforming to UL 508 must be provided to shut off the equipment served if installed in which location?

A Fireplace Stove is designed to be operated with the fire chamber doors in which position(s)?

Where a factory-built chimney assembly incorporates offsets, no part of the chimney shall be at an angle of more than what maximum degree from vertical at any point in the assembly?

A person shall not make energy source connections to mechanical systems that have been disconnected or ordered to be discontinued until whom authorizes the reconnection and use?

What is the maximum length allowed for a transition duct connecting a domestic dryer to the exhaust duct system?

What is the capacity in cfh for 2-inch nominal Schedule 40 metallic pipe at 500 feet in length, with an initial supply pressure of 11.0 in. w.c. or greater and a 6.0 in. w.c. pressure drop?

If a new permit is obtained after a permit has expired due to suspension or abandonment, and the work recommences, the fee shall be one-half the amount required for a new permit provided the suspension or abandonment has not exceeded how long?

Heat transfer fluids must be rated to withstand the system’s maximum design temperature under operating conditions without what?

The test pressure measuring device must have an accuracy of what maximum percentage of the test pressure?

Additions, alterations, renovations, or repairs shall not cause an existing mechanical system to become what?

Ducts used in systems exhausting nonflammable corrosive fumes or vapors must be constructed of nonmetallic materials that exhibit what maximum flame spread index?

A machinery room is not required for listed equipment containing not more than what maximum weight of refrigerant, regardless of the safety classification?

A Water Heater is any heating appliance or equipment that heats potable water and supplies such water to what system?

In an Indirect Refrigeration System classified as a Closed System, the secondary fluid is circulated how?

Where vibration isolation of equipment and appliances is employed, what means shall be used to accomplish the required support and restraint?

Steel, stainless steel, and wrought-iron pipe shall be not lighter than which schedule?

Underground ducts must have a minimum slope to allow drainage to a point provided with access of not less than what slope?

What is the maximum spacing of supports required for vertical 1-inch O.D. smooth-wall tubing?

What is strictly prohibited from connecting to a chimney passageway venting another appliance?

As applied to gas, the ratio of the weight of a given volume to that of the same volume of air, both measured under the same condition, is defined as:

A pipe in a hydronic piping system in which the exterior temperature exceeds 250{F} must have a minimum clearance of what distance to combustible materials?

The unique identifying alphanumeric value assigned to an individual refrigerant is published in which standard?

A field-constructed chimney composed of solid masonry units, bricks, stones or concrete is a:

A pilot that operates during the lighting cycle and discontinues during main burner operation is a(an):

Where must the makeup air supply system for a commercial kitchen be automatically controlled to start and operate?

Which occupancy group is exempt from the requirement to provide space-heating systems capable of maintaining 68°F (20°C)?

A vented appliance designed for installation within the fire chamber of a vented fireplace, wherein the primary function lies in the aesthetic effect of the flames, is defined as a:

Fuel oil piping and equipment located in flood hazard areas must be capable of resisting hydrostatic and hydrodynamic loads and stresses, including what specific effect?

The code official is authorized to issue a stop work order where work is being performed in a manner contrary to the provisions of this code or in a(an):

What is the Occupational Exposure Limit (OEL) in ppm for R-134a?

Chimney connectors are prohibited from passing through which building elements?

Air dispersion systems must be utilized in systems operating under what pressure characteristic?

As an alternative to prescriptive ventilation methods for hydrogen-generating operations, air supply for ventilation and dilution of flammable gases may be provided by what type of system?

Appliances located in public garages or repair garages shall be installed not less than what distance above the floor?

For the reduction of required clearances to combustible materials, the allowable reduction must be based on one of the methods specified in Table 308.2 or shall utilize a reduced clearance protective assembly listed and labeled in accordance with which standard?

What is the minimum internal area (in square inches) required for a clay-tile-lined exterior masonry chimney flue for a 5-inch diameter Type B double-wall connector when used for single appliance venting?

When the design and free area of louvers and grilles are unknown, what free area percentage is assumed for metal louvers and grilles in combustion air calculations?

The code regulates the design, installation, maintenance, and inspection of mechanical systems that are permanently installed and utilized to provide control of environmental conditions and related processes within buildings. What is the fourth regulatory action specified?

Where Class I liquids are pumped, used, or transferred in bulk plants or terminals, where shall adequate openings for natural ventilation in outside walls be provided?

What components are strictly prohibited in the rigid metal ductwork of a common multistory exhaust system for clothes dryers?

A technical opinion and report required by the code official shall be provided to the jurisdiction:

A Unit Heater is designed for the delivery of warm air where?

Masonry fireplaces must be constructed in accordance with which code?

If factory inspections have been performed on an installation, the system shall have an identifying label permanently affixed indicating:

If a person violates a provision of this code after due notice has been served, how is the continuation of that violation measured?

What is the minimum test duration required for a gaseous hydrogen system test?

For a chimney venting system serving a single appliance with a draft hood, the effective area of the chimney flue shall be not less than the area of the draft hood outlet nor greater than what multiple of the draft hood outlet area?

What is the capacity in cfh for 2-inch nominal OD Polyethylene plastic pipe at a length of 500 feet, for natural gas with an inlet pressure of 2.0 psi and a 1.0 psi pressure drop?

For gas cabinets and exhausted enclosures containing highly toxic or toxic compressed gases, what ventilation function are they specifically prohibited from serving?

Equipment, materials or products to which have been affixed a label, seal, symbol or other identifying mark of a nationally recognized testing laboratory or approved agency is defined as:

Where a combination system requires water for space heating at temperatures higher than 140F, a temperature-actuated mixing valve conforming to ASSE 1017 must be provided to temper the potable hot water distribution system water to what maximum temperature?

Air transported to occupied spaces through dust-producing materials by means other than natural convection shall be treated in what manner before entering the occupied space, in accordance with Section 605?

Appliance and equipment vent terminals must be located such that doors cannot swing within what minimum horizontal distance of the vent terminals?

An employee charged with the enforcement of this code is relieved from personal liability for damages if acting for the jurisdiction in good faith and without:

The required thickness for hydronic piping insulation shall conform to the requirements of which code?

A vented appliance wherein the primary function lies in the aesthetic effect of the flames is a:

What must be provided prior to placing a gaseous hydrogen system into operation to displace the air in the piping system?

Single-wall metal pipe shall be constructed of galvanized sheet steel not less than what minimum thickness?

For a multiple zone recirculating system, if the Maximum Primary Outdoor Air Fraction [$Max (Z_p)$] is 0.40, what is the System Ventilation Efficiency ($E_v$)?

For flammable vapor areas, the spraying equipment shall be interlocked with the ventilation such that spraying operations cannot be conducted unless the ventilation system is in operation. This system must be kept in operation until when?

Temporary uses, equipment, and systems must conform to the requirements of this code as necessary to ensure health, safety, and:

What concentration characteristic defines highly abrasive particulate that is classified as Abrasive Materials?

Who is authorized and directed to enforce the provisions of this code?

Where vents pass through attic space, the insulation shield must terminate not less than what vertical distance above the insulation materials?

What are the parts of a refrigerating system subject to condenser pressure?

The holder of a permit for partial construction proceeds at risk without assurance that the permit for the entire installation will be granted, provided that adequate information and detailed statements have been filed complying with all pertinent requirements of this code, and the partial permit has been issued by the:

Where a solar thermal system directly heats potable water for a potable water distribution system, the pipe, fittings, valves and other components must comply with the requirements of which code?

An enclosed space extending through one or more stories of a building, connecting vertical openings in successive floors, or floors and the roof, is a:

In a parking garage, connection to a room with a fuel-fired appliance must be by means of a vestibule providing a two-doorway separation, except that a single door is permitted if the sources of ignition in the appliance are what?

To verify compliance with listing standards, the listing standard and manufacturer’s instructions shall be made available to the code official when required to verify:

For undiluted liquefied petroleum gas systems, the point of delivery shall be considered to be the outlet of which device?

If an emergency exists, what is the code official not required to give prior to stopping the work?

For a copper brazed swaged fitting connection with a size of 1/2 inch, what is the required minimum cup depth?

Labeling procedures are set forth in Sections 301.8.1 through which final subsection?

For Type IV and V dry cleaning systems, the automatically activated exhaust ventilation system must maintain a minimum air velocity of not less than how many feet per minute through the loading door when the door is opened?

In a laboratory space provided with two or more gas outlets, the single dedicated shutoff valve must be located adjacent to which building feature?

For an exterior masonry chimney serving a single space-heating appliance in a climate zone with a Local 99% Winter Design Temperature of 5 to 16°F, with a vent height of 15 feet and an internal area of 113 square inches, what is the minimum allowable input rating in thousands of Btu per hour?

Which portion of the piping is NOT required to be insulated in a solar thermal system?

When calculating the installed thickness (R-value) for duct wrap, the installed thickness shall be assumed to be what percentage of the nominal thickness (representing 25 percent compression)?

To ensure reliability, approved agencies must have adequate equipment to perform all required tests and must periodically perform what action to that equipment?

What is a device that transfers heat from one medium to another?

What Zone Air Distribution Effectiveness is permitted for systems with a floor supply of cool air and ceiling return, provided displacement ventilation achieves unidirectional flow and thermal stratification?

Where rooms are ventilated through an adjoining room, the minimum openable area to the outdoors shall be based on what total area?

Where must circulating air for fuel-burning, forced-air-type, warm-air furnaces be conducted into the blower housing from outside the furnace enclosure?

A valve, installed by the serving gas supplier between the source of supply and the point of delivery, to shut off the entire piping system, is a:

Electrical connections between appliances and building wiring, including grounding of the appliances, must conform to which standard?

Repair garages for lighter-than-air fuels (other than hydrogen) shall have air supply inlets and exhaust outlets arranged to provide uniformly distributed air movement, with outlets located where?

Which of the following is defined as an Ignition Source?

A Toilet Room is a room containing a water closet and sometimes a lavatory, but not what other fixture?

Access to a dedicated enclosure containing an appliance (where combustion air is taken directly from the outdoors) shall be through a solid door equipped with what type of closing device?

What is the minimum clearance required between a single-wall metal pipe connector and combustible material when serving a medium-heat appliance?

Indoor mechanical exhaust intake openings must be located where refrigerant leakage is likely to concentrate based on the refrigerant’s relative density to air and what other factors?

A Type B or L gas vent shall terminate not less than what minimum vertical height above the highest connected appliance draft hood or flue collar?

Exemption from permit requirements shall not grant authorization for work to be done in violation of:

What is the minimum required dimension of the ventilation opening into the sauna room located near the top of the door?

A listed and labeled chimney composed of factory-made components, assembled in the field in accordance with manufacturer’s instructions and the conditions of the listing, is a:

A change in a system that involves an extension, addition or change to the arrangement, type or purpose of the original installation is a(an):

What is the maximum horizontal spacing allowed for supporting steel tubing?

Condensate piping shall maintain a minimum slope in the direction of discharge of not less than what unit vertical in 12 units horizontal?

Mechanical systems can be located below the required flood elevation if they are designed and installed to prevent water from entering or accumulating within components and to resist what other loads and stresses?

The person issued an annual permit must keep a detailed record of alterations made under the permit, and the code official shall have what level of access to such records?

Joints used underground in ground-source heat pump loop systems shall be of what type?

Nonmetallic ducts shall be constructed with which classes of duct material?

Where the maximum horizontal length of a connector (for multiple appliances) is exceeded, the maximum capacity (FAN Max or NAT Max) of the vent connector must be reduced by what percentage for each additional multiple of the allowed length?

If a roof-mounted pollution-control unit is installed, what is the minimum distance it must be mounted above the roof?

What must be installed as an alternative to required guards?

That portion of an appliance designed for the attachment of a draft hood, vent connector or venting system is the:

Relief valve discharge piping must terminate not more than how many inches above the floor or flood level rim of the waste receptor?

A device that will prevent the backflow of one gas into the supply system of another gas and prevent the passage of flame into the gas supply system is a:

The cross-sectional area of a flue serving a solid-fuel-burning appliance shall be no greater than what multiple of the cross-sectional area of the appliance flue collar?

The total horizontal distance of a vent plus the horizontal vent connector serving draft-hood-equipped appliances shall be not greater than what percentage of the vertical height of the vent?

When using Type B double-wall gas vent connected directly to a single Category I appliance, if the vent height (H) is 6 feet and the vent diameter (D) is 4 inches, what is the maximum input rating (NAT Max) for a Natural Draft appliance?

Welding on pressure vessels must be performed by an R-Stamp holder in accordance with the National Board Inspection Code, Part 3, or what other requirement?

When considering modifications in flood hazard areas, the code official must determine that the granting of a variance will not cause fraud on or victimization of the public or:

Refrigeration systems containing more than what weight of refrigerant require additional stop valves at locations like the inlet of each liquid receiver?

For a corrugated metallic chimney liner system installed in a masonry chimney, the maximum capacity determined from the Type B vent tables shall be reduced by what percentage?

Where ducts used for cooling are externally insulated, the insulation must be covered with a vapor retarder having a maximum permeance of what value, unless the insulation itself meets this standard?

For vertical terminations of mechanical draft systems, the vent shall terminate not less than how many feet above any forced air inlet located within 10 feet horizontally?

What is the purpose of a Flue Liner (Lining)?

When automatically operated, the ventilation system for an enclosed parking garage must cycle to a “Full-on” mode at an airflow rate of not less than how many CFM per square foot of floor area served?

Smoke detectors required in air distribution systems must be listed and labeled for installation in air distribution systems, and duct smoke detectors must comply with which UL standard?

Stud wall cavities utilized as air plenums shall not convey air from more than how many floor levels?

Supply and exhaust ducts to the machinery room must be covered with corrosion-resistant screen of not less than what mesh size?

In areas where stationary motor vehicles are operated, a source capture system must be provided that connects directly to what?

Stationary fuel-cell power systems having a power outlet not exceeding 10 MW shall be tested in accordance with which ANSI/CSA standard?

A boiler not listed by a nationally recognized testing agency is a(an):

For a rectangular aluminum duct with a dimension of 17 inches operating at 1/2-inch water gauge static pressure in a single dwelling unit, what is the minimum sheet metal thickness required?

A specific heating, or heating and ventilating, furnace incorporating an integral total enclosure and using only outside air for combustion is a(an):

A nontoxic, gaseous hydrogen system mixture must contain not more than what maximum percentage of oxygen by volume?

In conjunction with a request to use an alternative material, the code official is authorized to require submittal of a report prepared by a peer reviewer acceptable to the code official. What type of report is this?

If an installation is maintained in violation of this code and in violation of a notice, the code official shall institute appropriate action to prevent, restrain, correct, or:

Roof-mounted solar thermal equipment shall not obstruct or interfere with the operation of which items?

What is the minimum clearance required from the sides and rear of a vertical connector where the original required clearance was 9 inches, and the protection is 1-inch glass fiber or mineral wool batts sandwiched between two sheets of 0.024-inch sheet metal with ventilated airspace?

Occupiable spaces may be combined into a single Zone if they share similar occupancy classification (Table 403.3.1.1), occupant density, zone air distribution effectiveness, and what fourth factor?

The code official is authorized to suspend or revoke a notice of approval where it is determined that the building, structure, or premises is in violation of:

If the vapor concentration monitor shuts down during unmanned spray operations where recirculation is permitted, what volume of air specified in Section 509 must be automatically exhausted?

What is the minimum test duration required for each 500 cubic feet (14.2 m3) of pipe volume or fraction thereof in a gaseous hydrogen system?

Fuel oil piping must be tested in accordance with which NFPA standard?

Appliances located in private garages shall be installed with a minimum clearance of what distance above the floor?

What is the minimum net airflow required for a Wall-mounted Canopy Hood used for medium-duty cooking appliances?

Where enclosures are not required, what is the minimum clearance required from noncombustible construction and gypsum wallboard attached to noncombustible structures for Type I hood grease duct systems?

What is the required continuous exhaust rate capacity for bathrooms and toilet rooms in Group R-2, R-3, and R-4 occupancies?

Machinery rooms larger than what minimum area must have not less than two exits or exit access doorways?

When the design and free area of louvers and grilles are unknown, what free area percentage is assumed for wood louvers in combustion air calculations?

Appliances using forced draft venting and incorporating integral venting means must maintain what minimum clearance between vent terminals and openings through which combustion products enter the building?

What is excluded from being construed as air ducts in the definition of a Duct?

What must an approved agency do periodically with its test equipment?

When a change in occupancy is made, who must certify that the structure meets the intent of governing law for the proposed new occupancy and does not result in any hazard?

A listed smoke damper designed to resist the passage of smoke shall be provided at each point that a duct or air transfer opening penetrates a fire wall or fire barrier that serves as what?

Ducts in a private garage that penetrate a wall or ceiling separating a dwelling from the garage must be constructed of sheet steel having a minimum thickness of not less than what gauge?

Exhaust outlets for grease ducts must be located not less than how many feet above adjoining grade level?

Discrete electrical, plumbing, and mechanical products having exposed combustible material and located in a plenum must be listed and labeled for such use in accordance with which UL standard?

The flash point of the heat transfer fluid utilized in a solar system must be not less than what minimum temperature above the design maximum nonoperating (no-flow) temperature of the fluid attained in the collector?

In an Indirect Refrigeration System classified as an Open-Spray System, the secondary coolant is circulated in what kind of contact with the air or other substance to be cooled or heated?

The maximum horizontal length of a single-wall connector shall be what percentage of the height of the chimney or vent?

In fuel-dispensing areas, the bottom of an air inlet or exhaust opening shall be located not more than how many inches above the floor?

Refrigerant piping and tubing greater than what maximum diameter shall be tested in accordance with ASHRAE 15?

Where a listing standard is not specified by the code for equipment, materials, products, or services, the listing shall be based on what?

Brazed joints must be made with a filler metal conforming to which AWS standard?

Once issued, approved construction documents shall not be changed, modified, or altered without authorization from the:

In a return air system, where must the smoke detector be installed relative to filters, exhaust air connections, and outdoor air connections?

What is the minimum clearance required from the sides and rear of a single-wall metal pipe where the original required clearance was 18 inches, and the protection is 1-inch glass fiber or mineral wool batts sandwiched between two sheets of 0.024-inch sheet metal with ventilated airspace?

What is the minimum wall thickness required for copper tubing used as a fuel oil line?

Which type of vent is listed and labeled for use with appliances that are listed for use with Type L or Type B vents?

Commercial refrigerators, freezers, beverage coolers, and walk-in coolers must be tested in accordance with UL 471 or which other standard?

The top of a guard required on a roof or elevated structure shall be located not less than how many inches above the elevated surface adjacent to the guard?

An annual permit may be issued for alterations to an already approved system upon application to any person, firm, or corporation regularly employing at least how many qualified tradespersons?

Pipe insulation installed in buildings must have a maximum flame spread index of what value when tested in accordance with ASTM E84 or UL 723?

What phenomenon is NOT listed as a cause of pressure differences resulting in infiltration?

Oil-fired floor furnaces must be tested in accordance with which UL standard?

Exhaust outlets that terminate through exterior walls shall not be located within what minimum horizontal distance of any opening in the exterior wall?

Corridor dampers must have a minimum fire-resistance rating of what duration?

Air intake openings and living space exhaust air openings of an individual dwelling unit can use a factory-built intake/exhaust combination termination fitting if the separation distance is less than what distance?

Where a single appliance has more than one draft hood outlet or flue collar, and manufacturer instructions are absent, the vent connectors must have a minimum rise of what distance?

Stainless steel pipe and tubing for hydronic systems must conform to which specific set of ASTM standards?

Listed and labeled fireplace accessories must comply with which UL standard?

Combustion air ducts that are not provided with dampers and that pass through rated construction must be enclosed in a shaft in accordance with which code?

For all environmental air exhaust, what is the minimum termination distance from a property line?

In Group H occupancies, fire dampers are not required at penetrations of fire partitions where the partition is penetrated by a duct system having a maximum area of what size?

In institutional occupancies, the total of all Group A2, B2, A3, and B3 refrigerants shall not exceed what maximum weight in occupied areas or machinery rooms?

External hood joints, seams, and penetrations for Type I hoods must be made with a continuous external liquid-tight weld or braze to where?

Evaluation reports issued to support approval of materials or assemblies not specifically provided for in the code must be issued by whom?

Where appliances requiring service are installed on a sloped roof (3 units vertical in 12 units horizontal or greater) and the roof edge is more than 30 inches above grade, how large must the level platform be on the service side?

Common venting systems for appliances located on more than one floor level are prohibited, except where all served appliances are located in rooms that are accessed only from where?

A technical opinion and report required by the code official shall be provided without charge to whom?

A floor furnace (excluding wall register models) shall not be placed closer than what minimum distance to the nearest wall?

Which system is an exception to the requirement that air removed by mechanical exhaust systems must be discharged outdoors?

Combustion air includes what two components?

A steel vent connector for a medium-heat appliance with a vent gas temperature exceeding 1,000°F and a diameter of 18 inches or less must be lined with medium-duty fire brick that is not less than how thick?

In the “Standby” mode of operation for automatically controlled enclosed parking garage ventilation systems, the minimum airflow rate shall be not less than how many CFM per square foot of floor area served?

Condensate pumps located in uninhabitable spaces, such as attics and crawl spaces, must be connected to the appliance served such that when the pump fails, the appliance will be prevented from what?

Drain-back systems must be designed and installed to allow for manual gravity draining of fluids from areas subject to freezing to locations not subject to freezing, and what else?

In the exception for adjoining spaces, if an exterior opening opens into a thermally isolated sunroom addition, what is the minimum openable area required between the sunroom and the interior room?

For Group R-2, R-3, and R-4 occupancies, mechanical ventilation air requirements shall be provided by which system configuration?

When installing or repairing gas piping, the finished floors, walls, and ceilings that are required to be changed or replaced must be left in a safe structural condition in accordance with the requirements of the:

What is a factory-made assembly of refrigeration components designed to compress and liquefy a specific refrigerant?

Who is responsible for furnishing the apparatus, instruments, material, and labor required for testing an installation?

A conductor installed to electrically connect metallic gas piping to the grounding electrode system is a:

Metallic ducts for air distribution systems (other than those within single dwelling units) must be constructed as specified in which standard?

The connector shall not be smaller than what dimension provided by the appliance manufacturer?

Piping and piping system components for hydronic systems shall be sized based on what factor?

Where shall the listing and labeling of equipment and appliances used for refrigeration be in accordance with?

Connections from a utility, source of energy, fuel, or power to any system regulated by this code for which a permit is required shall not be made until authorized by whom?

Additives contained in a Food-Grade Fluid must be listed in accordance with what code reference?

Grease duct-to-hood joints must be made with continuous internal or external liquid-tight welded or brazed joints that are smooth, without grease traps, and available for what?

What is the minimum closed cup flash point for Class IIIB Combustible Liquids?

For smoke barriers in non-sprinklered buildings using the pressurization method, the pressure difference across the smoke barrier must be not less than what value relative to the maximum calculated pressure difference produced by the design fire?

Subslab soil exhaust system ducts shall have a minimum slope in the direction of discharge of not less than what slope?

Explosion control systems must be designed and installed in accordance with which section of the International Fire Code?

What is the minimum temperature of the products of combustion at the point of entrance to the flue for a High-heat appliance under normal operating conditions?

Which method allows a venting system (chimney or vent) to pass through a plenum, provided it is installed such that fittings and joints between sections are not installed in the above ceiling space?

Piping run from a pressure-regulating or pressure-limiting device to the outdoors, designed to provide for the safe venting of gas in the event of excessive pressure in the gas piping system, is defined as:

What is the capacity in thousands of Btu per hour for CSST Flow Designation 31 at 25 feet in length, for undiluted propane operating at 2.0 psi inlet pressure with a 1.0 psi pressure drop?

For chimney connector wall pass-through systems, insulation material that is part of the system shall be noncombustible and have a thermal conductivity of what maximum value?

Which venting system is required for unlisted appliances?

In a repair garage for liquid or odorized gas fueled vehicles, mechanical exhaust systems that are electrically interlocked with the lighting circuit are allowed as an exception to what general requirement?

A device that functions to maintain a desired draft in the appliance by automatically reducing the draft to the desired value is a:

TABLE 614.9.4.1 QUESTION: What is the longest equivalent length required by the table for a single duct fitting in a domestic dryer exhaust duct system?

Apparatus and devices other than appliances are defined as:

What specific type of damper is explicitly prohibited from being installed in combustion air ducts?

What must a clearly identified switch of the break-glass type or with an approved tamper-resistant cover provide for the machinery room ventilation fans?

The pipe that connects an appliance to a chimney or vent is the:

Performing work on a mechanical system in conflict with or in violation of any provision of this code shall be deemed what type of act?

Flexible connectors, expansion, and vibration control devices and fittings must be of what specific characteristic?

Structures occupied for purposes involving explosion hazards must be provided with explosion control where required by which code?

Condensate piping from condensing fuel-burning appliances must maintain a minimum horizontal slope in the direction of discharge of not less than what slope?

What is the minimum clearance required for radiant panels from an element when mounted on wood or steel framing?

If appliances or equipment are subject to water damage when auxiliary drain pans fill, that portion of the appliance, equipment, and insulation must be installed where?

The side railing of a permanent ladder providing roof access must extend above the parapet or roof edge or landing platform not less than how many inches?

Subslab soil exhaust system duct material must be air duct material listed and labeled to the requirements of UL 181 for which air duct class?

Tests required by this code shall be made by the permit holder and observed by the:

Ambient air that enters a building through a ventilation system, intentional openings for natural ventilation, or by infiltration is defined as what?

What are the parts of a refrigerating system subject to evaporator pressure?

A pressure regulator for controlling pressure to the manifold of the appliance is a:

The treatment of air so as to control simultaneously the temperature, humidity, cleanness, and distribution of the air is known as what?

In the definition of Commercial Cooking Appliances, what is the criteria regarding the preparation of food?

Single-wall metal pipe is prohibited from passing through any attic, inside wall, concealed space or:

Shutoff valves are not required in the supply and return piping for a system having which specific type of boiler?

Defective material or parts must be replaced or repaired in a manner that preserves which characteristic?

The officer or other designated authority charged with the administration and enforcement of this code, or a duly authorized representative, is the:

For permanent ladders installed to provide roof access, what is the minimum clear width required between rails?

The maximum length of a domestic clothes dryer exhaust duct shall be 35 feet (10 668 mm) from the connection to the transition duct to the outlet terminal, before reductions for fittings.

To prevent the accumulation of flammable vapors during floor resurfacing, what is the minimum mechanical ventilation rate required per square foot of area being finished?

In the One-Permanent-Opening Method (304.6.2), the single opening must commence within what distance of the top of the enclosure?

Refrigeration System Classification is based on the degree of probability that leaked refrigerant will enter an occupied area based on what primary factor?

The assembled ground-source loop system must be pressure tested with water at 100 psi (689 kPa) for a minimum of how long before backfilling connection header trenches?

Flue lining systems for use with residential-type and low-heat appliances shall be limited to clay flue lining complying with ASTM C315 or equivalent, listed and labeled chimney lining systems complying with UL 1777, and what other approved materials?

If a commercial electric dishwasher incorporates a self-contained condensing system listed and labeled in accordance with UL 921, is a hood required?

A blower or fan used for the purpose of distributing supply air to a room, space or area is a(an):

Which type of space is explicitly excluded from the definition of an Occupiable Space?

Transition ducts connecting a domestic dryer to the exhaust duct system shall not be more than what maximum length?

The mechanical ventilation system must also exhaust a volume required to limit the room temperature rise to what maximum differential?

For a roof slope of Flat to 6/12, what is the minimum required vertical height (H) above the roof to the lowest discharge opening?

A Pressure Relief Valve is held closed by a spring or other means and designed to relieve pressure automatically in excess of what?

What type of valve is a Safety Valve used in a steam boiler?

What type of fitting may be used to separate air streams between intake air openings and living space exhaust air openings of an individual dwelling unit where the separation distance is less than 3 feet?

Appliances shall not be installed in a location where subject to mechanical damage unless protected by what?

Where an emergency exists, the code official is not required to provide a written notice prior to:

What type of concentration is the Occupational Exposure Limit (OEL) based on?

A system designed to act to shut off the gas supply to the main and pilot burners if the oxygen in the surrounding atmosphere is reduced below a predetermined level is a(an):

For natural ventilation in hydrogen-generating locations, the maximum rated output capacity of hydrogen-generating appliances shall not exceed 4 standard cubic feet per minute (0.00189 m3/s) of hydrogen for each how many square feet of floor area?

Smoke damper leakage ratings must be Class I or II, and the elevated temperature ratings shall be not less than what minimum temperature?

Electric pool and spa heaters must be tested in accordance with which UL standard?

In a Low-Probability System, where will a leakage of refrigerant from a failed connection NOT enter?

Mechanical outdoor air intake openings shall be located not less than how many feet horizontally from any hazardous or noxious contaminant source?

Connectors must rise vertically to the chimney or vent with a minimum pitch equal to what slope?

Equipment and appliances having an ignition source shall not be installed in Group H occupancies or control areas where open use, handling, or dispensing of which materials occurs?

For equipment with a capacity over 125 tons up to 250 tons of refrigeration, what is the minimum required condensate pipe diameter?

A Permanent Mechanical Joint that incorporates an elastomeric seal and corrosion-resistant grip or bite ring is called a what?

What type of appliance is strictly prohibited from being installed within a plenum?

Air intake openings that terminate outdoors must be protected with corrosion-resistant screens, louvers, or what other devices?

When required, design submittals must be prepared by, and bear the stamp of, which professional?

Materials, equipment, and devices may be reused only if they are in good working condition and:

Which piece of information is required to appear on a permanent factory-applied nameplate affixed to an appliance?

Plastic ducts used for underground installation must be constructed of PVC having a minimum pipe stiffness of what value at 5-percent deflection?

What is the minimum clearance required from the sides and rear of an appliance where the original required clearance was 18 inches, and the protection is 3 1/2-inch-thick masonry wall with ventilated airspace?

Which material is exempted from carrying the identification of the manufacturer on each length of pipe and tubing?

When required for alternative materials or designs, a peer review report must be prepared by a peer reviewer who is approved by the:

Which types of equipment or appliances require condensate drain systems?

What must be provided for water heaters and hot water storage tanks to ensure easy removal?

Where appliances are installed in pits or excavations, the walls of the pit or excavation must be held back not less than what distance from the appliance?

Ground-source heat pump loop system piping must be marked where it enters a building, indicating “GROUND-SOURCE HEAT PUMP LOOP SYSTEM” and what two other pieces of information?

Refrigerants reprocessed to the same specifications as for new refrigerants by means including distillation are classified as what?

If treatment of exhaust for air pollution control is necessary, manifolding of ducts is allowed if what finishing material is specifically prohibited from being used?

For existing buildings in flood hazard areas, the code official must determine if proposed work for reconstruction or repair constitutes:

Corridors and other common areas within the conditioned space of Group R-2, R-3, and R-4 occupancies shall be provided with outdoor air at what minimum rate per square foot of floor area?

New installations and parts of existing installations that have been altered, extended, renovated, or repaired shall be tested to disclose:

Required test and inspection records for prefabricated mechanical systems shall be available to the code official at all times during the fabrication of the system and what other process?

Before a permit is issued, the code official is authorized to inspect and evaluate the systems, equipment, buildings, devices, premises and spaces or areas to be used in a procedure known as a:

What is the minimum clearance to combustibles required for chimney connectors serving medium-heat oil and solid-fuel appliances?

Which type of appliance must be used in a dwelling unit kitchen where the kitchen and living spaces are in a single room, and return air is taken within 10 feet of the cooking appliance?

If a portion of this code is held to be unconstitutional, what effect does this decision have on the validity of the remaining portions?

A pipe or other conduit composed of factory-made components, containing a passageway for conveying combustion products and air to the atmosphere, listed and labeled for use with a specific type or class of appliance, is a:

Which type of floor furnace depends primarily on circulation of air by gravity and includes those equipped with booster-type fans that do not materially restrict free circulation when not operating?

A connection from a utility, source of energy, fuel, or power shall not be made to any regulated building or system for which a permit is required until authorized by the:

A permittee holding an unexpired permit shall have the right to apply for an extension of time. Provided there is reasonable cause, the code official shall extend the time for a period not exceeding how many days?

If the depth of an appliance pit or excavation exceeds 12 inches (305 mm) below adjoining grade, the pit walls must be lined with concrete or masonry extending not less than how far above adjoining grade?

What is the minimum testing standard for electric residential clothes dryers?

A medium-heat appliance has products of combustion temperatures at the point of entrance to the flue that are more than 1,000°F (538°C) but not greater than:

Floor furnaces installed in upper stories must be separated from the nonhabitable space below by an enclosure constructed of what type of material?

Space within a dwelling unit utilized for living, sleeping, eating, cooking, bathing, washing and sanitation purposes is defined as:

When using the Two-Permanent-Openings Method (304.6.1) and communicating with the outdoors through horizontal ducts, what is the minimum free area required for each opening per 2,000 Btu/h of total appliance input rating?

Interpretations, policies, and procedures adopted by the code official shall not have the effect of:

A connector entering a masonry chimney must be cemented to the masonry in an approved manner, and where thimbles are installed to facilitate removal, the thimble must be permanently cemented in place with what?

The fuel input rate for an appliance shall not be increased or decreased beyond the limit rating for what specific environmental factor?

Vent connectors are generally prohibited from being covered with insulation, except when the connectors are:

If a code provision is less restrictive than the conditions of the listing or the manufacturer’s instructions, which provisions shall apply?

A device responsive to changes in pressure, temperature or level for turning on, shutting off or throttling the gas supply to an appliance is a:

Gas-fired appliances shall be vented in accordance with which other code?

Which type of LP-gas appliances and equipment is generally outside the scope of this code?

Semirigid metallic tubing used to connect an appliance to the piping system must be located entirely in the same room as the appliance and shall not exceed what maximum length?

Which portions of a hydronic piping system are an exception to the requirement that the entire system must be designed and installed to permit draining?

Vented gas fireplaces shall be listed in accordance with which ANSI/CSA standard?

What is the minimum air gap required between a clearance reduction system using a ventilated airspace and combustible walls and ceilings?

A valve of the plug and barrel type designed for use with gas, and equipped with a lever handle for manual operation and a dial to indicate the percentage of opening is a:

Liquid-level indicating gauges for fuel oil systems must comply with which UL standard?

Vent pipe outlets for purging gaseous hydrogen systems shall be located not less than what minimum height above the adjacent ground level?

Elevation of the ignition source is NOT required for appliances that are listed as what?

Foam plastic used as interior wall or ceiling finish or interior trim in plenums is permitted to exhibit a flame spread index of 75 or less and a smoke-developed index of 450 or less if it is separated from the airflow by corrosion-resistant steel having a base metal thickness of not less than what dimension?

In a common multistory duct system for clothes dryers, the exhaust fan must run continuously and be connected to what?

An appliance equipped with an integral mechanical means to either draw or force products of combustion through the combustion chamber or heat exchanger is a(an):

Which valve controls the gas supply to an individual main burner?

When calculating Net Occupiable Floor Area, how shall obstructions such as furnishings, display or storage racks, whether temporary or permanent, be treated?

What must be done to abandoned inlet openings in chimneys and vents?

Where vents pass through insulated assemblies, an insulation shield must be installed, constructed of steel having a minimum thickness of what gauge (0.0187 inch)?

What is the minimum required clearance from the top of a high-pressure steam boiler having heating surface in excess of 1,000 square feet to the ceiling?

Where terms are not defined in this code, they shall have meanings ascribed to them as defined in which other referenced code?

When testing at a pressure of 10 psig (68.95 kPa gauge) or less, the testing gauge must have increments of what maximum amount?

What is the minimum distance required between the lowest edge of a grease filter and an exposed flame or burner cooking surface?

Who is the designated authority charged with the administration and enforcement of this code?

What is the minimum separation distance required for the atmospheric venting of Compressed Natural Gas (CNG) from buildings?

The code official shall be appointed by which authority?

Vented wall furnaces must be located so that a door cannot swing within what minimum distance of an air inlet or air outlet of the furnace?

What is the minimum letter height required for the permanent warning notice attached to the outside of a commercial sauna room?

What is the minimum clearance required to combustibles for hazardous exhaust ducts conveying flammable vapors?

Penetrations of floor/ceiling assemblies and assemblies required to have a fire-resistance rating must be protected in accordance with the:

A Type B-W gas vent shall have a listed capacity not less than that of the listed vented wall furnace to which it is connected.

A permit shall not be valid until:

Electrical wiring, controls, and connections to equipment and appliances regulated by this code must be in accordance with which standard?

What is the maximum acceptable flame spread distance for combustible electrical wires and cables exposed within a plenum when tested in accordance with NFPA 262?

Rigid metallic pipe and fittings, semirigid metallic tubing and fittings or a listed and labeled device that connects an appliance to the gas piping system is a(an):

A Duct Furnace depends on a blower not furnished as part of the furnace for what purpose?

Additions, alterations or repairs shall not cause an existing installation to become:

If the outdoor air ventilation system in a dwelling unit does not operate continuously, what is the minimum required operation time within each 4-hour period?

In the brazing process, how is the filler material distributed between the closely fitted surfaces of the joint?

Potable water supply and building drainage system connections to equipment and appliances regulated by this code shall be in accordance with which code?

Type L vents shall terminate not less than how many feet above the highest point of the roof penetration?

A single unit providing complete, independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation, is a:

If the depth of an underfloor passageway or service space exceeds 12 inches (305 mm) below adjoining grade, the walls of the passageway must be lined with what material?

Stationary fuel cell power systems having a power output not exceeding 10 MW must be tested in accordance with which standard?

What is the maximum capacity in cfh for 3/4-inch nominal O.D. Polyethylene plastic pipe (SDR 11) at 500 feet in length, operating at less than 2 psi inlet pressure with a 0.3 in. w.c. pressure drop?

If the quantity of refrigerant in an independent circuit exceeds the amounts in Table 1103.1, all components containing the refrigerant shall be located either outdoors or where?

An adapter for joining plastic pipe to steel pipe, providing a permanent, pressure-tight connection between two materials that cannot be joined directly one to another, is defined as:

For connection to a masonry fireplace flue, the connector shall extend from the appliance such that the flue gases are exhausted directly into the flue, and the connector must be provided with access or be what?

Shutoff valves must be installed at connections to which type of expansion tanks?

Uninsulated single-wall metal pipe is prohibited from being used outdoors for venting appliances in regions where the 99-percent winter design temperature is below what temperature?

The use of gypsum boards to form air shafts (ducts) is limited to which type of air system?

Who shall keep a record of each inspection made, including notices and orders issued?

Floor-mounted-type unit heaters shall be installed with clearances to combustible materials at the back and one side only of not less than what minimum distance?

An Offset (Vent) is a combination of approved bends that makes how many changes in direction?

Boilers shall be designed, constructed, and certified in accordance with the ASME Boiler and Pressure Vessel Code, Section I or which other section?

What is the minimum termination distance required for chimneys or vents equipped with power exhausters from the lot line or adjacent buildings?

Equipment or machinery at lumber yards that generates combustible dust must be provided with an approved dust-collection and exhaust system installed in accordance with this section and what other code?

When the code official finds work regulated by this code being performed in a manner contrary to the provisions of this code, the code official is authorized to issue what?

What is the minimum number of bottom blowoff valves required for a steam boiler where the maximum allowable working pressure exceeds 100 psig (689 kPa)?

In a High-Probability System, leakage of refrigerant from a failed connection will enter where?

What is required to be provided in each vertical riser of a clothes dryer exhaust duct?

Thread lubricant, pipe-joint compound or thread tape must be applied only on which part of a threaded joint?

An airflow differential pressure control on a pollution-control unit must activate a visual alarm located where when the airflow is reduced below the design velocity?

Raised face flanges shall not be joined to which type of flat-faced flange?

In a Limited Charge System, with the compressor idle, the design pressure will not be exceeded when what condition occurs?

Ladders over 30 feet (9144 mm) in height must be provided with offset sections and landings capable of withstanding what minimum load?

What is the minimum thickness required for steel construction of a Type II hood?

An application for a permit shall be deemed abandoned how many days after the date of filing, unless pursued in good faith or a permit has been issued?

What is the primary function of a Control device?

A device placed in a gas line between the service pressure regulator and the appliance for controlling, maintaining or reducing the pressure in that portion of the piping system downstream of the device is a:

Steam bath equipment must be listed and labeled in accordance with which UL standard?

Materials that, where tested in accordance with ASTM E136, meet criteria regarding temperature rise, flaming duration, and weight loss are defined as:

An approved automatic fire suppression system is required in hazardous exhaust ducts, except where the largest cross-sectional diameter of the duct is less than how many inches?

If a single hood serves a combination of light-, medium-, and heavy-duty cooking appliances, which duty classification must the required exhaust rate be based on?

A gas-burning, automatically operated appliance for supplying cooled air, dehumidified air, or both, or chilled liquid is a(an):

The category of combustible liquids does not include which of the following?

What is the capacity in thousands of Btu per hour for CSST Flow Designation 37 at 300 feet in length, for undiluted propane operating at 11.0 in. w.c. inlet pressure with a 0.5 in. w.c. pressure drop?

What type of exhaust systems are prohibited from sharing common shafts with other duct systems?

Which type of temperature relief valve automatically opens and closes a relief vent, depending on whether the temperature is above or below a predetermined value?

Required ventilation systems for dip tank operations shall be arranged such that the failure of any ventilating fan will automatically stop what component?

What is the distinguishing fuel characteristic of an Extra-Heavy-Duty Cooking Appliance?

If there is insufficient evidence of compliance, who has the authority to require tests as evidence of compliance?

For acceptance tests conducted on boilers and pressure vessels, the pressure gauge scale shall be graduated over a range of not less than one and one-half times and not greater than what multiple of the maximum test pressure?

Exhaust ducts for domestic clothes dryers must have a smooth interior finish and be constructed of metal not less than what minimum thickness?

If an outdoor opening is rectangular, the size requirements for openings in louvers, grilles, and screens apply to which side?

Which openings are NOT allowed in the combustion chamber of a Closed Combustion Solid-Fuel-Burning Appliance?

When using compression-type mechanical joints on plastic piping, an internal tubular rigid stiffener shall be used and must be located flush with which part of the pipe?

The fuel gas piping, valves and fittings from the outlet of the point of delivery to the outlets of the appliance shutoff valves is defined as the:

Refrigeration systems containing carbon dioxide (R-744) must also comply with which IIAR standard?

Appliances and supports exposed to wind must be designed and installed to resist wind pressures in accordance with which code?

Shutoff valves used in fuel oil systems must comply with which UL standard?

Smoke detectors are generally required for return air systems with a design capacity greater than how many CFM?

Tapes and mastics used to seal fibrous glass ductwork must be listed and labeled in accordance with which UL standard?

Where the refrigerant-containing parts of a system are located in one or more spaces that do not communicate through permanent openings or HVAC ducts, the volume of which space determines the permissible refrigerant quantity?

Forced draft systems and portions of induced draft systems under positive pressure must be designed and installed to be what characteristic to prevent leakage of combustion products?

What component of systems is NOT included in the definition of Equipment?

Where enforcement of a code provision would violate the conditions of the listing of the equipment or appliance, which requirements shall apply?

Appliances installed in other than indoor locations must be listed and labeled for what type of installation?

Tests conducted to demonstrate equivalency for an alternative material must be of a scale that is sufficient to predict what aspect of the end use configuration?

The container placed at a low point in a system of piping to collect condensate and from which the condensate is removable is a:

What is a device actuated by another device, to govern succeeding operations of the same or allied devices?

A person who continues any work after being served with a stop work order, except work directed to remove a violation, shall be subject to:

Before a change in occupancy is made that subjects the structure to any special provision of this code, what must first be obtained?

Requirements necessary for public safety, health and general welfare that are not specifically covered by this code shall be determined by the:

An automatic or semiautomatic device consisting essentially of a valve and operator that control the gas supply to the burner(s) during operation of an appliance is a(an):

Commercial electric water heaters must comply with which UL standard?

Pipe hangers and supports in direct contact with piping shall be of approved materials that are compatible with the piping and will not promote what type of action?

An unvented gas log heater can only be installed in a factory-built fireplace if the system has been specifically tested, listed, and labeled for such use in accordance with which standard?

Which appliance may be installed in a sleeping room if it is a direct-vent appliance?

Household cooking appliances shall have a vertical clearance above the cooking top of not less than 30 inches (760 mm) to combustible material and metal cabinets, unless the clearance is reduced to 24 inches (610 mm) and what minimum thickness of insulating millboard is used for protection?

During occupied conditions, the normal mechanical ventilation system must exhaust not less than 0.5 cfm per square foot (0.0025 m3/s × m2) of machinery room area or what other minimum rate per person?

The maximum flame spread index and smoke-developed index requirements for pipe insulation do not apply to which specific building type?

Where are fireplaces and solid fuel-burning appliances prohibited from being installed?

What is the minimum required thickness (in inches) for a steel vent connector serving a medium-heat appliance with a diameter of up to 14 inches?

A Vented Room Heater burns which types of fuel?

Shutoff valves serving movable appliances (such as cooking appliances) are considered provided with access when installed where?

What is the capacity in cubic feet per hour (cfh) for CSST Flow Designation 37 at a length of 50 feet, for natural gas with a 3.0 in. w.c. pressure drop?

The flash point of transfer fluid in a hydronic piping system shall be not less than what minimum temperature above the maximum system operating temperature?

In addition to being experienced in conducting and supervising tests, personnel employed by an approved agency must be educated in evaluating what?

Combination potable water-heating and space-heating systems must be sized to prevent the space-heating load from diminishing what other required capacity?

Stop valves on copper tubing or aluminum tubing 1 inch (25.4 mm) outside diameter or larger shall not be supported by what?

Interior spaces intended for human occupancy must be provided with active or passive space-heating systems capable of maintaining an indoor temperature of not less than how many degrees Fahrenheit?

Commercial-industrial-type incinerators shall be constructed and installed in accordance with which NFPA standard?

Outdoor or return air for forced-air heating and cooling systems shall not be taken closer than what minimum distance from an appliance vent outlet?

A Protective Assembly (Reduced Clearance) that is attached directly to a combustible assembly shall not be considered as part of what?

Unless ready access is provided for complete inspection at the site, in-plant inspections of prefabricated systems shall be conducted by the code official or an independent, approved inspection agency to ensure conformance to the approved evaluation report.

Where natural draft venting systems for Category I appliances include offsets, the offsets shall not exceed what maximum angle from the vertical?

Outdoor Air is defined as air taken from the outdoors and is characterized as not having been previously circulated through what?

Clearances to combustible construction must be reduced only in accordance with which section?

What is the LFL (Lower Flammability Limit) for R-1234yf in parts per million (ppm)?

For 3/4-inch Nominal OD Polyethylene plastic tubing (SDR 11) at a length of 500 feet, what is the capacity in cubic feet per hour (cfh) for natural gas with a 0.5 in. w.c. pressure drop?