2024 Commercial Mechanical Inspector – Flashcards

An individual who is registered or licensed to practice their respective design profession as defined by the statutory requirements of the professional registration laws of the state or jurisdiction is a:

For existing buildings in flood hazard areas, the code official must determine if proposed work for reconstruction or repair constitutes:

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?

What is the minimum net airflow required for a Double Island Canopy Hood (per side) used for extra-heavy-duty cooking appliances?

Soldered joints are limited to refrigeration systems using Group A1 refrigerant and having a pressure of less than or equal to what maximum pressure?

Listed self-contained systems using Group A3 refrigerant are exempt from restrictions if they contain a maximum of how many pounds?

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?

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?

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

For enclosed structures involving organic coating processes using Class I liquids, what is the minimum ventilation rate required per square foot of solid floor area?

In commercial tenant spaces, the use of corridors for conveying return air is permitted if the tenant space area is not more than what size?

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

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:

The makeup air supplied to a commercial kitchen must be conditioned such that the temperature difference between the makeup air and the design setpoint temperature in the kitchen space is not greater than what amount?

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

Exhaust system discharge for dust, stock, and refuse conveying systems is permitted to be recirculated, provided the solid particulate has been removed at a minimum efficiency of 99.9 percent at what particle size?

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

Exhaust outlets for grease ducts that terminate above the roof must have the discharge opening located not less than how many inches above the roof surface?

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?

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?

What is required for a Type I Hood, which collects and removes grease vapors and smoke?

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?

What is strictly prohibited from penetrating the grease duct walls?

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

What is the minimum clearance required to combustibles for hazardous exhaust ducts conveying flammable vapors?

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

Official records required by the code official shall be retained for not less than 5 years or for how long?

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

The LFL for refrigerants is determined in accordance with specific test conditions established by which standard?

If the proposed work conforms to code requirements and all fees have been paid, who shall issue the permit to the applicant?

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?

Where is Return Air removed from?

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?

If work authorized by a permit is suspended or abandoned for a period of 180 days, the permit shall:

In indoor locations intended for hydrogen-generating or refueling operations using natural ventilation, what is the maximum floor area permitted?

Who is authorized to require design submittals for reports not complying with Section 104.2.3.6.1 to be prepared by, and bear the stamp of, a registered design professional?

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?

An enclosed space extending through one or more stories of a building, connecting vertical openings in successive floors, is defined as what?

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?

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

A Protective Assembly (Reduced Clearance) that is attached directly to a combustible assembly shall not be considered as part of what?

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:

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

Hazardous exhaust duct systems shall extend directly to the exterior of the building and shall not extend into or through what two building elements?

What is the minimum level working space required in front of the control side to service an appliance?

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?

Certification obtained by the manufacturer indicating that the function and performance characteristics of a product have been determined by testing and ongoing surveillance by an approved third-party certification agency is defined as:

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?

Where work does not pass an initial test or inspection, after necessary corrections are made, the work shall be resubmitted to the code official for:

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

Which standard applies to Copper or copper-alloy tubing (Type K, L or M) used for fuel oil piping?

Any combination of outdoor and transfer air intended to replace exhaust air and exfiltration is defined as:

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

For a Type B double-wall vent serving two or more Category I appliances with Type B double-wall connectors (Table 504.3(1)), if the vent height (H) is 15 feet and the connector rise (R) is 6 feet (the max rise for R=6 ft row), what is the maximum combined input rating (NAT+NAT) for a 9-inch common vent diameter?

What is the minimum clearance required above an appliance where the original required clearance was 9 inches, and the protection is 1/2-inch insulation board with ventilated airspace?

For smoke control systems, belt-driven fans must have what multiple of the number of belts required for the design duty, with a minimum of two belts?

Using the Standard Method (304.5.1), what is the minimum required volume of indoor air per 1,000 Btu/h of the appliance input rating?

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

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:

Where must the discharge line of a fuel oil system relief valve connect?

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

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?

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?

Preparation of pipe ends requires that pipe be cut square and free from burrs and obstructions, and what two other actions?

What is the minimum diameter required for the overflow installed at the top of an open-type expansion tank?

Chimneys for residential-type or low-heat appliances must extend not less than 3 feet above the highest point where they pass through a roof and not less than what minimum height higher than any portion of a building within a horizontal distance of 10 feet?

The code official is authorized to establish a:

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

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?

The amount of return air taken from any room or space shall not be greater than what value?

What is the purpose of providing Excess Air for the combustion of a fuel?

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

Where plastic vents are specified by the appliance manufacturer for Category IV appliances, are they required to be listed and labeled?

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

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

What is the minimum thickness required for a galvanized steel chimney connector larger than 16 inches in diameter serving a low-heat appliance, according to Table 803.9(1)?

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

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

What is the LFL (Lower Flammability Limit) for R-1234yf in parts per million (ppm)?

If a commercial electric dishwasher incorporates a self-contained condensing system listed and labeled in accordance with UL 921, is a hood required?

What must Type L vents terminate with?

The function of the code compliance agency is the implementation, administration, and enforcement of the provisions of this code, and the official in charge shall be known as the:

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

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

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

Which of the following framing cavities or spaces is NOT permitted to be utilized as an air plenum?

Where terms are not defined in this code, they shall have meanings ascribed to them as defined in which other referenced code?

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:

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

An approved agency that tests mechanical equipment and appliances must maintain a record of all tests performed to verify compliance with what?

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?

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:

When does a permit become valid?

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?

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

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?

If granted, an extension of time to commence work under an unexpired permit shall not exceed how many days?

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

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

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?

Unvented alcohol fuel-burning decorative appliances must be listed and labeled in accordance with which UL standard?

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

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

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

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

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?

Factory-built chimneys for medium-heat appliances producing flue gases having a temperature above 1,000°F must be listed and labeled in accordance with which UL standard?

Machinery rooms larger than what minimum area must have not less than two exits or exit access doorways?

What is the exact amount of air required to supply oxygen for complete combustion of a given quantity of a specific fuel?

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?

Where all combustion air is provided by a mechanical air supply system, what is the minimum required supply rate per 1,000 Btu/h of total appliance input rating?

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

For detached one- and two-family dwellings not more than three stories above grade plane, compliance shall be with the code or which other regulatory document?

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

In Group I-1 and I-2 occupancies, range hoods over domestic cooking equipment must have a minimum airflow rate of how many CFM?

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?

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?

A Portable Fuel Cell Appliance utilizes what connection type to a grid-isolated load?

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

What is the maximum control voltage permitted for the electrical control system of a boiler?

Cleanouts in horizontal grease ducts must have opening dimensions of not less than what minimum size?

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?

What type of concentration is the Occupational Exposure Limit (OEL) based on?

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

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

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?

What is the maximum water temperature allowed for a hot water supply boiler at or near the boiler outlet?

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):

What is a characteristic of a Direct Solar System?

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

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

In addition to meeting minimum CFM requirements, the exhaust rate for xenon motion picture projectors must be such that the exterior temperature of the lamp housing does not exceed what temperature?

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

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

What primary contaminants does a Type II Hood collect and remove?

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

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?

What additional device must be installed in the room with a manually fired appliance or fireplace when utilizing a mechanical draft system?

Who is authorized to establish a refund policy for fees?

Supply and exhaust ducts to the machinery room must be covered with corrosion-resistant screen of not less than what mesh size?

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

A masonry chimney flue cleanout opening must have a minimum height of 6 inches and its upper edge must be located not less than what vertical distance below the lowest chimney inlet opening?

Who must obtain the required permit before beginning work regulated by this code?

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

Air intake openings that terminate outdoors must be protected with corrosion-resistant screens, louvers, or what other devices?

The code official shall perform all of the following duties EXCEPT:

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

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?

Appliances and supports exposed to wind must be designed and installed to resist wind pressures in accordance with which code?

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?

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?

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

If the air infiltration rate of a structure is known to be less than 0.40 ACH, which method must be used to determine the required volume of indoor air for combustion?

The termination of concealed condensate piping must be marked to indicate connection to which two types of drains?

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?

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

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

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

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

Type L vents and pellet vents shall be tested in accordance with which UL standard?

What is the capacity in cfh for 4-inch nominal Schedule 40 metallic pipe at 500 feet in length, operating at 3.0 psi inlet pressure with a 2.0 psi pressure drop?

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

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

A through-the-wall direct-vent terminal serves an appliance rated at 100,000 Btu/h. What is the minimum clearance required to an openable window (Clearance B)?

Who is authorized to approve an alternative material, design, or method of construction?

When calculating reduced clearances using Table 308.4.2, reduced clearances shall not be derived by what process below the range of the table?

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

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

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

Air necessary for complete combustion of a fuel, including theoretical air and excess air, is defined as:

Where vents penetrate outside walls, the annular spaces around such penetrations must be permanently sealed using approved materials to prevent entry of combustion products into the building.

The pipe that connects an appliance to a chimney or vent is the:

If a timer is provided to control the main burner operation of a sauna heater, what is the maximum operating time allowed?

Controls and safety devices for boilers with fuel input ratings of less than 12,500,000 Btu/hr must meet the requirements of which standard?

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?

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

The fuel input rate for an appliance shall not be increased or decreased beyond the limit rating for what specific environmental factor?

When is cross-connection protection NOT required for potable water supplies to solar systems?

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?

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

What is the maximum water volume allowed for a compressed gas container or cylinder that is exempt from the requirement to be used in an upright position?

Who must sign the application for a permit?

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?

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

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

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?

The approved agency must periodically perform an in-plant inspection of the appliances to be labeled to verify that the labeled appliances are representative of the appliances that were:

Drain and fill valves must be labeled with a description and warning that identifies the fluid in that loop as “Potable Water,” “Food-Grade Fluid,” “Nonfood-Grade Fluid” or what fourth category?

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?

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?

For an exterior masonry chimney serving a single space-heating appliance in a climate zone with a Local 99% Winter Design Temperature of 27 to 36°F, with a vent height of 10 feet and an internal area of 38 square inches, what is the minimum allowable input rating in thousands of Btu per hour?

Oil-fired floor furnaces must be tested in accordance with which UL standard?

Factory-built cooling towers must be listed in accordance with UL 1995 or which other standard?

Where different portions of this code specify different materials or methods of construction for a specific case, which requirement shall govern?

Flexible air ducts shall not be limited in length, but flexible air connectors shall be limited in length to what maximum dimension?

What is an assembly consisting of a hearth and fire chamber of noncombustible material, provided with a chimney, for use with solid fuels?

Which piece of information is required to appear on a permanent factory-applied nameplate affixed to an appliance?

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?

When a violation continues each day after due notice has been served, how is that classified?

Louvers that protect exhaust openings in structures located in hurricane-prone regions must comply with which standard?

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

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?

Ducts shall not be attached to wall furnaces unless what condition is met?

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

The code official is authorized to appoint a deputy code official, technical officers, and inspectors with the concurrence of whom?

If appliances are served by a mechanical air supply system, what must be provided to prevent main burner operation when the mechanical air supply system is not operating?

According to Table 308.4.2, what is the reduced clearance for a horizontal combustible assembly located above the heat source if the required clearance without protection is 36 inches and the protection is galvanized sheet steel (No. 24 gage) spaced 1 inch off the combustible assembly?

What must be provided for water heaters and hot water storage tanks to ensure easy removal?

What is the capacity in cubic feet per hour (cfh) for Flow Designation 23 CSST at a length of 100 feet, for natural gas with a 6.0 in. w.c. pressure drop?

Which warning statement is required on the fluid safety labeling for drain and fill valves?

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

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?

Exhaust hood systems for domestic cooking capable of exhausting in excess of how many CFM must be provided with makeup air?

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)?

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?

Joints between dissimilar metallic piping materials must be made with a dielectric fitting or what other component conforming to dielectric tests of ASSE 1079?

What are the two primary components that a Venting System is usually composed of?

For a nondirect-vent terminal, what is the minimum clearance required below or to the side of an openable window or door opening (Clearance B)?

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?

The maximum flame spread index and smoke-developed index requirements for pipe insulation do not apply to which specific building type?

Which of the following is defined as an Ignition Source?

Grease ducts shall be considered concealed where installed in shafts or covered by coatings or wraps that prevent visual inspection on how many sides?

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?

The officer or other designated authority charged with the administration and enforcement of this code, or a duly authorized representative, is the:

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

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?

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.

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:

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?

Stop valves are required on refrigeration systems containing more than how many pounds of refrigerant?

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

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

Smoke detectors are generally required for return air systems with a design capacity greater than how many CFM?

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?

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):

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?

Where a listing standard for equipment is not specified by this code, the listing shall be based on:

Devices or safeguards required by this code shall be maintained in compliance with which edition of the code?

What type of joint connection must NOT be used for clothes dryer exhaust ducts?

A pressure regulator in series with one or more other pressure regulators is a:

A Dwelling contains not more than how many dwelling units?

Where appliances are located on more than one floor and served by a common vent, the total available height (H) for each segment shall be measured from the highest draft hood outlet or flue collar entering that segment to which location?

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

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

A valve that automatically opens and closes a vent for relieving a vacuum within the hot water supply system, depending on whether the vacuum is above or below a predetermined value, is a:

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?

Cleanout openings in grease ducts are required to be spaced not more than how many feet from changes in direction greater than 45 degrees (0.79 rad)?

Log lighters shall be listed in accordance with which standard?

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?

Where leakage or other defects are located during testing, what must be done to the affected portion of the piping system?

For naturally ventilated hydrogen-generating operations, what is the minimum free area required for the two permanent openings per 1,000 cubic feet of garage volume?

A boiler not listed by a nationally recognized testing agency is a(an):

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?

Exhaust ducts for domestic clothes dryers shall be supported at intervals not exceeding what maximum distance?

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

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

To determine compliance with maintenance provisions, who has the authority to require an installation to be reinspected?

Exposed refrigerant piping installed in open spaces that afford passage shall be not less than what minimum height above the finished floor?

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

A horizontal vent system termination shall terminate not less than how many feet below, horizontally from, or 1 foot above any door, window, or gravity air inlet into the building?

Where a structure or premises is occupied and the code official needs to perform an inspection, what must the code official do?

Catwalks installed to provide required access on elevated structures shall be not less than how many inches wide?

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

What type of system converts solar radiation to thermal energy for use in heating or cooling?

Who is authorized to terminate a permit for temporary uses, equipment or systems and order the same to be discontinued?

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

Metallic ducts for air distribution systems (other than those within single dwelling units) must be constructed as specified in which standard?

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

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

Who shall perform fire tests conducted to demonstrate equivalent fire safety for an alternative material?

The board of appeals shall hold office at the pleasure of which entity?

Which type of space is explicitly excluded from the definition of an Occupiable Space?

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?

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?

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

For an unlisted appliance having a draft hood, the ventilated metal thimble used where the single-wall metal pipe passes through a combustible exterior wall must be not less than how much larger in diameter than the metal pipe?

What is required to be provided in each vertical riser of a clothes dryer exhaust duct?

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:

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

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?

Upblast fans serving Type I hoods and installed in a vertical or horizontal position must be hinged and equipped with a means of restraint to limit what?

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

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

What must failure of the exhaust ventilation system cause in a repair garage for lighter-than-air fuels?

What is the maximum percentage of the specified minimum yield strength of the pipe that the hoop stress can reach during a pressure test exceeding 125 psig (862 kPa gauge)?

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

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

Equipment and appliances used to exhaust explosive or flammable vapors, fumes, or dusts must bear an identification plate stating what information?

For a Kitchen (cooking) in a food and beverage service occupancy, what is the required Exhaust Airflow Rate in CFM/ft squared?

What type of hood must be installed over extra-heavy-duty cooking appliances?

Stationary engine generator assemblies must meet the requirements of which UL standard?

Ductless mini-split equipment that produces condensate must be provided with an inline check valve located in the drain line or what other device?

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?

In private garages, equipment and appliances having an ignition source must be elevated such that the source of ignition is not less than what distance above the floor?

For HPM exhaust ducts, what is prohibited from being installed in the exhaust ducts?

In Group I-2, Condition 2 occupancies, gas fireplace appliances and decorative gas appliances are prohibited except where they are direct-vent appliances installed in:

What is the estimated maximum occupant load rate per 1,000 square feet for a Smoking lounge?

A metal-to-metal compression joint in which a conical spread is made on the end of a tube that is compressed by a flare nut against a mating flare is defined as what?

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)?

Rough-in inspection shall be made after the roof, framing, fireblocking, and bracing are in place and all ducting and other components to be concealed are complete, and prior to the installation of what?

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?

A room or space in which people sleep, which can include permanent provisions for living, eating, and either sanitation or kitchen facilities but not both, is defined as what?

Except for engineered systems, what is the minimum area required for a chimney or vent serving a single appliance?

When conveying particulate matter, hazardous exhaust systems must be designed employing which method?

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?

If an outdoor opening is rectangular, the size requirements for openings in louvers, grilles, and screens apply to which side?

What is the minimum thickness required for the concrete encasement of an underground grease duct system?

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

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

When equipment and ductwork for exit enclosure ventilation are located within the exit enclosure, where must the intake air be taken from?

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?

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:

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

Where natural draft venting systems for Category I appliances include offsets, the offsets shall not exceed what maximum angle from the vertical?

In flood hazard areas, exhaust outlets serving structures shall be installed at or above the elevation required for utilities and attendant equipment by which code section?

A burner in which gas, air or both are supplied at pressures exceeding, for gas, the line pressure, and for air, atmospheric pressure, with this added pressure being applied at the burner is a(an):

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?

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

What is the minimum net airflow required for a Wall-mounted Canopy Hood used for medium-duty cooking appliances?

What is the function of a Flame Safeguard?

Within dwelling units, unobstructed stud and joist spaces are permitted to convey combustion air, provided that not more than how many required fireblocks are removed?

A device that will automatically shut off the fuel supply to a main burner or group of burners when the means of ignition becomes inoperative or flame failure occurs is a:

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

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?

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:

If subject matter in a referenced standard is within the scope of this code, which provisions shall take precedence?

For liquid single-phase solar energy systems, the expansion tanks must be sized in accordance with Section 1009, with an additional expansion tank acceptance volume equal to the total volume of liquid contained in what two components?

Exhaust outlets for grease ducts must be located not less than how many feet above adjoining grade level?

A through-the-wall direct-vent terminal serves an appliance rated at 10,000 Btu/h. What is the minimum clearance required to an openable window (Clearance B)?

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

Where an emergency exists, the code official is not required to provide a written notice prior to:

Brazing alloys used in hydrogen service piping must have a melting point greater than what minimum temperature?

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

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?

Listed and labeled fireplace accessories must comply with which UL standard?

Refrigerant piping systems erected in the field shall be pressure tested for strength and leak tested for tightness after installation and before being placed in operation, in accordance with which section?

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

Air-conditioning systems that supply required ventilation air must be provided with controls designed to automatically maintain the required outdoor air supply rate during which time period?

For which purpose may the code official authorize the temporary connection of a system to a utility?

A time limit for compliance with an order to remove or restore an unsafe installation to a safe condition shall be specified in the:

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.

Masonry chimneys exposed to the outdoors on one or more sides below the roof line are defined as:

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?

A fireplace composed of listed factory-built components assembled in accordance with the terms of listing is a:

Vent pipe outlets for purging gaseous hydrogen systems shall be located not less than what minimum height above the adjacent ground level?

Mechanical joints used on steel or stainless steel fuel oil pipe and employing an approved elastomeric seal must generally be installed in which location?

In multiple-tenant buildings, shutoff valves for each tenant must be provided with access and must be located where?

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:

Appliances located in private garages and carports shall be installed with a minimum clearance of how many feet above the floor?

In residential garages, appliances installed in a separate, enclosed space having access only from outside the garage are permitted to be installed at floor level, provided the required combustion air is taken from where?

A technical opinion and report required by the code official shall be provided without charge to whom?

The use of plastic solar collector covers serving as roof covering is limited to those approved light-transmitting plastics meeting the requirements for plastic roof panels in which specific section of the International Building Code?

For fire dampers, the operating temperature of the primary heat-responsive device must be approximately 50{F} above the normal duct temperature, but not less than what minimum temperature?

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

What is the testing standard a material must pass to be classified as a Noncombustible Material?

What is the minimum horizontal distance required between vertical discharge fans and parapet-type building structures?

Where is nonmetallic fuel oil pipe permitted to be installed?

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

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?

The installing contractor or registered design professional must issue a certificate of test to the code official for all refrigeration systems containing what minimum amount of refrigerant?

The use of toxic fluids in solar thermal systems must comply with Chapter 60 of the International Fire Code and which federal act?

A room primarily utilized for the installation of a boiler is defined as what?

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?

What is the minimum length (in feet) of nominal 4-inch piping that, when removed from service, must have its residual fuel gas displaced with an inert gas?

Steel pipe joints embedded in concrete must be welded by electrical arc method or what other method?

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

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

Where used in this code, the term ” piping ” refers to:

Where factory-built chimneys pass through attic space, how high above the insulation materials must the insulation shield terminate?

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?

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

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

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?

Commercial electric water heaters must comply with which UL standard?

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

Which exhaust systems are allowed to be located in ceiling return air plenums over spaces permitted to have 10 percent recirculation (Section 403.2.1, Item 4), provided the duct joints comply with Section 603.9?

Metallic ducts installed underground and not having an approved protective coating must be completely encased in not less than how many inches of concrete?

Open-type expansion tanks shall be located not less than how many feet above the highest heating element?

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?

The strength and rigidity of posts greater than 3 feet (914 mm) in height supporting illuminating appliances must be at least equivalent to a 2 1/2-inch-diameter (64 mm) post constructed of what minimum thickness of steel?

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

Prior to the approval of a prefabricated construction assembly having concealed work and the issuance of a permit, the code official shall require the submittal of a(an):

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

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:

An oxygen-depletion safety system on an unvented room heater shall shut off the gas supply when the oxygen in the surrounding atmosphere is depleted to the percent concentration specified by the manufacturer, but not lower than what minimum percentage?

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

The pressure difference created by a vent or chimney because of its height, and the temperature difference between the flue gases and the atmosphere, is defined as:

What is the minimum clearance required above the top of the sloping side of a vertical draft hood on a suspended unit heater?

Which valve standard is approved for general valve applications up to 125 psig pressure?

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)?

When rooftop-mounted solar thermal collectors are mounted on or above the roof covering, the collector array and mounting systems must be constructed of noncombustible materials or what other material conforming to the International Building Code?

Recovered refrigerants may be reused only in the system from which they were recovered and in other systems of what party?

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?

New installations and parts of existing installations that have been altered, extended, renovated, or repaired shall be tested to disclose:

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?

Type L vents shall terminate not less than how many feet above the highest point of the roof penetration?

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

A thermostat in which the motion of the valve is approximately in direct proportion to the effective motion of the thermal element induced by the temperature change is a:

Dampers equipped with fusible links, internal operators, or both must be provided with an access door that is not less than how many inches square?

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

What is the minimum clearance required above an appliance where the original required clearance was 12 inches, and the protection utilized is 1/2-inch insulation board over 1-inch glass fiber or mineral wool batts?

Hydronic piping materials must be rated for the operating temperature and pressure of the system and must be suitable for what other specific factor?

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

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

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?

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

Mechanical ventilation systems must be provided with manual or automatic controls that will operate such systems whenever the spaces are in what state?

For gas engine-powered equipment and turbines, what connection method is prohibited to the gas supply piping to protect against the effects of normal vibration?

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?

What must be done to the parts in a Plastic Heat Fusion Joint to permit fusion of the materials when the parts are pressed together?

The code official shall be appointed by which authority?

What is the required People Outdoor Airflow Rate in the Breathing Zone in CFM/person for a Bedroom/living room in hotels, motels, resorts, and dormitories?

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?

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?

What is the minimum thickness required for steel construction of a Type II hood?

For Refrigerant Pressure Vessels, evaporators are excluded if each separate section does not exceed what maximum refrigerant-containing volume?

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?

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

When utilizing a combustible gas detector to monitor purging, when shall purging be stopped?

Storage tanks and heating equipment installed in outdoor locations must be designed for what specific condition?

Insulation R-values for slab-on-grade and suspended floor installation for radiant heating systems must be in accordance with which code?

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?

Where in an occupied area should the inlet to an exhaust system be located?

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

Plume discharges from cooling towers, evaporative condensers, and fluid coolers must be located not less than how many feet above or away from any ventilation inlet to a building?

A vent cap must be installed on vertical terminations of mechanical draft systems for what purpose?

Pressure relief devices shall be arranged to discharge to the outdoors, except for DOTn-specified containers with an internal volume not exceeding what maximum amount?

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

What type of appliance is strictly prohibited from being installed within a plenum?

A plastic that is capable of being repeatedly softened by increase of temperature and hardened by decrease of temperature is:

An appliance vented by natural draft shall not be connected into a vent, chimney, or vent connector on which side of a mechanical flue exhauster?

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):

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 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?

Appliances regulated by this code must be listed and labeled for their application unless approved in accordance with which section?

Which type of vent is listed and labeled for use with appliances that are listed for use with Type L or Type B vents?

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:

When split-style piping insulation is used in a solar loop, what must be sealed?

What is the capacity in cfh for 1 1/4-inch nominal Schedule 40 metallic pipe at 100 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?

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

What is the minimum pressure difference required across a smoke barrier in buildings equipped throughout with automatic sprinkler systems when utilizing the pressurization method?

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

Screens used for combustion air openings shall have a mesh size not smaller than what dimension?

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

Exhaust outlets that terminate through exterior walls shall not be located within what minimum horizontal distance of any opening in the exterior wall?

What is the capacity in cfh for 1 1/2-inch nominal Schedule 40 metallic pipe at 1,000 feet in length, operating at 3.0 psi inlet pressure with a 2.0 psi pressure drop?

According to Table 1009.2, what is the required nonpressurized expansion tank capacity in gallons for a system volume of 500 gallons?

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?

A metal-to-metal compression joint in which a conical spread is made on the end of a tube that is compressed by a flare nut against a mating flare is a:

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

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?

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

A fuel oil fill pipe must terminate outside a building at a point not less than what minimum distance from any building opening at the same or lower level?

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

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

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

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:

Compartments housing equipment used in aircraft fueling and defueling operations shall be adequately ventilated at floor level or within what other location?

In machinery rooms using Group A2L and B2L refrigerants, open flame-producing devices or continuously operating hot surfaces shall not exceed what maximum temperature?

Controls and safety devices for boilers with inputs greater than or equal to 12,500,000 must meet the requirements of which standard?

Galvanized sheet steel auxiliary drain pans must have a minimum thickness of not less than what gauge?

Where equipment is located on a roof such that personnel must climb higher than 16 feet (4877 mm) above grade to access it, what type of access must be provided?

Under what concentration of the lower flammable limit (LFL) is air exhausted from spraying operations permitted to be recirculated as makeup air for unmanned spray operations?

What is the minimum closed cup flash point for Class IIIB Combustible Liquids?

As an alternative to the provisions of Sections 1202 and 1203, hydronic piping shall be designed, installed, inspected, and tested in accordance with which standard?

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

In a Limited Charge System, with the compressor idle, the design pressure will not be exceeded when what condition occurs?

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

For domestic kitchen cooking appliances with downdraft exhaust systems, PVC pipe and fittings are permitted under a concrete slab poured on grade, provided the underfloor trench is completely backfilled with what?

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

Appliances equipped with an automatic burner ignition and safety shutoff device and other automatic devices that accomplish complete turn-on and shutoff of the gas to the main burner(s) and graduate the gas supply, but do not affect complete shutoff of the gas, are defined as:

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

What is the approximate number of threads required to be cut for a 2 1/2-inch iron pipe size?

Structures occupied for purposes involving explosion hazards must be provided with explosion control where required by which code?

Who appoints the code official?

For piping materials other than steel pipe and CSST, exposed piping must be identified by a yellow label marked “Gas” in black letters at intervals not exceeding what distance?

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

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?

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

What is the maximum temperature of the products of combustion at the point of entrance to the flue for a Low-heat appliance (residential appliance) under normal operating conditions?

For Group R-2, R-3, and R-4 occupancies, the minimum continuous outdoor airflow rate is calculated using Equation 4-9 based on conditioned floor area and what other variable?

A thermostat controlling a sauna heater must limit the room temperature to what maximum temperature?

A manually operated damper shall not be placed in the vent connector for any appliance, but fixed baffles and balancing baffles are not classified as manually operated dampers.

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

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?

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?

Plastic pipe, fittings, and components must be third-party certified as conforming to which 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 must a clearly identified switch of the break-glass type or with an approved tamper-resistant cover provide for the machinery room ventilation fans?

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

To prevent the entry of room air into a chimney flue below the point of connection to an appliance serving a fireplace, what type of seal must be provided?

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?

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

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

In a Wall Canopy Hood, what component acts as a back panel, forcing the makeup air across the front of the cooking equipment?

Cutting, notching, and boring of wood framing members shall comply with which section of the International Building Code?

Evaluation reports issued to support approval of materials or assemblies not specifically provided for in the code must be issued by whom?

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

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?

What type of damper must comply with the requirements of UL 555C or be tested as part of a fire-resistance-rated floor/ceiling or roof/ceiling assembly in accordance with ASTM E119 or UL 263?

The application for a permit shall be signed by whom?

What is the minimum clearance required from the sides and rear of an appliance where the original required clearance was 6 inches, and the protection utilized is 1/2-inch insulation board over 1-inch glass fiber or mineral wool batts?

Appliances located in private garages shall be installed with a minimum clearance of what distance above the floor?

Supports for cooling towers, evaporative condensers, and fluid coolers must be designed in accordance with which code?

Arc-resistant-jacketed CSST shall be listed as arc resistant in accordance with which standard?

When two or more appliances are connected to a vertical vent or chimney, the flow area of the largest section of vertical vent or chimney shall not exceed what multiple of the flow area of the smallest listed appliance categorized vent area?

Tests conducted to demonstrate equivalent fire safety must be sufficient scale to predict fire safety performance of the:

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

Exhaust fan motors serving a Type I hood must be located where relative to the exhaust airstream?

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?

Which type of thermostat senses temperature changes and controls the flow of gas to the burner(s) electrically, by means of separate components?

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:

If non-stainless steel or non-black steel piping is installed through wood studs less than 1 1/2 inches (38 mm) from the nearest edge, what minimum thickness must the required steel shield plates have?

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

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:

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

A refrigerating system where the evaporator or condenser is in direct contact with the air or other substances to be cooled or heated is defined as what?

Construction or work for which a permit is required shall remain visible and able to be accessed for inspection purposes until:

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

What is a device actuated by another device, to govern succeeding operations of the same or allied devices?

What is the pipe that connects an approved fuel-fired appliance to a vent?

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?

A Vented Room Heater burns which types of fuel?

Additions, alterations, renovations, or repairs related to structural issues shall be regulated by which other code?

Smoke damper leakage ratings must be Class I or II, and the elevated temperature ratings shall be not less than what minimum temperature?

Shutoff valves used in fuel oil systems must comply with which UL standard?

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

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

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

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?

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?

What is the minimum distance required between the lowest edge of a grease filter and an exposed flame or burner cooking surface?

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

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

What is a factory-made assembly of refrigeration components designed to compress and liquefy a specific refrigerant?

Vent connectors are generally prohibited from being covered with insulation, except when the connectors are:

Recirculating direct-fired air heaters shall not be installed in buildings that contain flammable solids, liquids or gases, explosive materials, or substances that can become toxic when exposed to flame or heat.

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.

A nontoxic, gaseous hydrogen system mixture must contain at least what minimum percentage of hydrogen gas by volume?

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

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 8 feet, the lateral (L) is 5 feet, and the vent diameter (D) is 9 inches, what is the minimum input rating (FAN Min)?

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

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?

Reused pipe, fittings, valves, or other materials must be clean and free from foreign materials and must be approved by whom for reuse?

What is the minimum thickness required for the steel insulation shield installed where factory-built chimneys pass through insulated assemblies?

Outdoor Air is defined as air taken from the outdoors and is characterized as not having been previously circulated through what?

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

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?

Inlet ducting, where used with nonrecirculating direct-fired industrial air heaters, shall be purged by not less than how many air changes prior to an ignition attempt?

Refrigerant piping protection is not required outside the building if the piping is installed underground not less than how many inches below finished grade and protected against corrosion?

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

What is the minimum wall thickness required for copper tubing used as a fuel oil line?

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?

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

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

Appliances shall not be installed in a location where subject to mechanical damage unless protected by what?

The Breathing Zone is the region within an occupied space located between planes 3 inches (76 mm) and what maximum height above the floor?

What is the purpose of a Draftstop?

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:

The Refrigerant Safety Group Classification indicates both the flammability and what other classification of refrigerants?

Where an appliance is connected to an existing chimney or vent, the system must be resized to control flue gas condensation and provide the required:

The board of appeals shall render all decisions and findings in writing to the appellant with a duplicate copy provided to the:

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

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?

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

What is the minimum flash point for Fuel Oil?

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:

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?

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 Pressure-Limiting Device designed to stop automatically?

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?

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

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?

Brazed joints must be made with a filler metal conforming to which AWS standard?

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?

Rooms containing appliances must be provided with a door and an unobstructed passageway measuring not less than what width and height?

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

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

Which medium is strictly prohibited from being used to pressurize fuel oil tanks?

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

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?

An air compartment or chamber to which one or more ducts are connected and that forms part of an air distribution system is a:

Spaces above, below, or behind what feature shall NOT be considered a concealed location?

For absorption units, the label information must include the hourly rating in Btu/h (W), the type of fuel, the type of refrigerant, the cooling capacity in Btu/h (W), and what other key information?

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):

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:

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?

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

An established and recognized organization that is regularly engaged in conducting tests, furnishing inspection services or furnishing evaluation or certification, where such organization has been approved by the code official, is a(an):

Why does a Single Island Canopy Hood require a greater exhaust airflow than an equivalent sized wall-mounted canopy?

Carbon monoxide and nitrogen dioxide detectors used for automatic operation of enclosed parking garage ventilation systems must be listed in accordance with which UL standard?

Upon issuance of a stop work order, how shall the cited work proceed?

For Type II dry cleaning systems, the mechanical ventilation system must be designed to exhaust air at what minimum rate per square foot of floor area?

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

A joint made by bolting together a pair of flanged ends is a:

Ducts discharging combustible material directly into any combustion chamber shall conform to the requirements of which standard?

Fire dampers must have a minimum rating of 1.5 hours for which type of fire-resistance-rated assemblies?

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

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?

A safety valve designed to forestall the development of a dangerous condition by relieving either pressure, temperature or vacuum in the hot water supply system is a:

The upper edge of a masonry chimney cleanout opening must be located not less than how many inches below the lowest chimney inlet opening?

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

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:

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

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?

For CPVC pipe joint connections, a primer is not required if the solvent cement is used only for joining CPVC pipe and fittings within what diameter range?

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 distinguishing fuel characteristic of an Extra-Heavy-Duty Cooking Appliance?

For horizontal terminations of mechanical draft systems adjacent to walkways, what is the minimum required height above the walkway level?

Which occupancy includes hospitals, nursing homes, asylums, and spaces containing locked cells?

The treatment of air so as to control simultaneously the temperature, humidity, cleanness, and distribution of the air is known as what?

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

When a multistory common vent system includes an offset that does not exceed 45 degrees, the common vent capacity listed in the tables must be reduced by what percentage for the segment containing the offset?

The fee for a permit, where required, shall be paid in accordance with the schedule established by whom?

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?

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

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

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

Refrigeration systems containing carbon dioxide (R-744) must also comply with which IIAR standard?

A fire chamber and hearth constructed of noncombustible material for use with solid fuels and provided with a chimney is a:

What NFPA standard dictates the exhaust ventilation requirements in public garages, private garages, repair garages, automotive motor fuel-dispensing facilities and parking garages that contain hydrogen-generating appliances or refueling systems?

A Peer Review must be conducted by whom?

Supply air plenums formed by gypsum boards shall not be incorporated in air-handling systems utilizing which specific cooling system type?

Which components are exempt from the requirement for locking access port caps if installed in controlled areas such as roofs with locked access hatches or doors?

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

Materials, equipment, and devices approved by the code official must be constructed and installed in accordance with:

A draft hood must be located so its relief opening is not less than what minimum distance from any surface except that of the appliance it serves and the venting system?

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?

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

An Offset (Vent) is a combination of approved bends that makes how many changes in direction?

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

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?

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?

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:

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?

What is the required continuous exhaust rate capacity for bathrooms and toilet rooms in Group R-2, R-3, and R-4 occupancies?

Outdoor air intake openings located within 10 feet (3048 mm) of a contaminant source must be located not less than how many feet below the contaminant source?

A nontoxic, gaseous hydrogen system mixture must contain not more than what maximum percentage of oxygen by volume?

Fuel-fired appliances must be designed for use with the type of fuel to which they will be connected and for what other installation factor?

Where the duct is constructed of steel not less than 0.019 inch in thickness and there are no openings serving the corridor, smoke dampers are not required at which penetrations?

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

For underfloor spaces containing appliances, the unobstructed passageway from the access opening to the appliance shall be not more than what maximum length?

In an absorption system, what process is used to pressurize the refrigerant?

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

What is the maximum air temperature permitted within nonmetallic ducts?

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

Where a listing standard is not specified by the code for equipment, materials, products, or services, the listing shall be based on what?

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

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:

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?

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?

New wood-burning residential hydronic heaters must have what certification?

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?

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

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?

The provisions of this code shall not be deemed to nullify what?

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?

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?

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?

Overlapping duct joints in a grease duct system shall be installed to prevent ledges and obstructions from collecting grease or interfering with what process?

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?

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

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?

The Uncorrected Outdoor Air Intake flow rate for a multiple zone recirculating system is determined using Equation 4-6, which includes the Occupant diversity, defined by what ratio?

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?

A BTU is the quantity of heat required to raise the temperature of 1 pound (454 g) of water by how many degrees Fahrenheit?

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

Heating and cooling system design loads must be determined in accordance with the procedures described in which standard?

The mechanical ventilation system must also exhaust a volume required to limit the room temperature rise to what maximum differential?

What is the maximum capacity in cfh for 3/8-inch ACR semirigid copper tubing at 100 feet in length, operating at less than 2 psi inlet pressure with a 0.3 in. w.c. pressure drop?

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

Stop valves on copper tubing or aluminum tubing 1 inch (25.4 mm) outside diameter or larger shall not be supported by what?

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

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

Which vented appliance category operates with a positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent?

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

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 transition assembly in which plastic piping is installed and terminated above ground outside of a building is known as a(an):

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

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

Fire dampers are not required at penetrations of shafts where steel exhaust subducts extend vertically not less than how many inches in exhaust shafts?

For refrigerant blends not listed in Table 1103.1, a machinery room is required if the combined amount of blend components exceeds a limit of what maximum concentration by volume?

To free a gas conduit of air or gas, or a mixture of gas and air, is to:

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

Parts of fans in contact with explosive or flammable vapors, fumes or dusts shall be constructed of what type of materials?

Kerosene and oil-fired stoves must comply with NFPA 31 and which UL standard?

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?

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

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

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

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?

Vent connectors for medium-heat appliances are prohibited from passing through walls or partitions constructed of what type of material?

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

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

If the code official believes the estimated valuation of work provided by the applicant is underestimated, what action may be taken?

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?

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?

Control-air tubing for smoke control systems must be tested at what multiple of the operating pressure for not less than 30 minutes?

Before a change in occupancy is made that subjects the structure to any special provision of this code, what must first be obtained?

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

What is the required operating temperature for the actuation device of a ceiling radiation damper?

When calculating Net Occupiable Floor Area, how shall obstructions such as furnishings, display or storage racks, whether temporary or permanent, be treated?

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:

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

What is the maximum water pressure allowed for a hot water heating boiler at or near the boiler outlet?

For the purposes of hazardous exhaust, what rating of materials, as specified in NFPA 704, is used to define volatile or airborne materials posing a health hazard?

Ambulatory care facilities provide care to persons for less than how long?

When required, design submittals must be prepared by, and bear the stamp of, which professional?

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

What must an approved agency do periodically with its test equipment?

Refrigeration System Classification is based on the degree of probability that leaked refrigerant will enter an occupied area based on what primary factor?

Connectors must rise vertically to the chimney or vent with a minimum pitch equal to what slope?

A steam heating boiler generates steam that operates at a pressure not exceeding:

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

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

What machine is defined as a specific machine, with or without accessories, for compressing a gas?

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?

If work fails an initial test or inspection, what must be done to the work or installation before resubmission to the code official?

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?

Prior to approval of a prefabricated construction assembly having concealed mechanical work, what shall the code official require the submittal of?

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

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?

A cleanout must be provided on both the inlet and outlet sides of an in-line fan and located within what distance of the fan duct connections?

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:

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 a common multistory exhaust system for clothes dryers, rigid metal ductwork must be constructed of sheet steel having what minimum thickness?

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

Heat exchangers used in domestic water-heating systems must be approved for the intended use and must ensure the proper safeguarding of what?

Corridor dampers must have a minimum fire-resistance rating of what duration?

A burner that depends on draft induced by a fan that is an integral part of the appliance and is located downstream from the burner is a(an):

A pipe in a ground-source heat pump piping system having an exterior surface temperature exceeding 250{F} must have a minimum clearance of what distance from combustible materials?

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.

When shall the rough-in inspection be made?

A vertical pipe supplying fuel gas is defined as a:

What is the required Area Outdoor Airflow Rate in the Breathing Zone in CFM/ft squared for a Coin-operated laundry?

Who must test a representative sample of appliances being labeled to the relevant standard?

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

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

A heater that directs a substantial amount of its energy output in the form of infrared radiant energy into the area to be heated is a(an):

What must be installed as an alternative to required guards?

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?

The term House Piping is defined as:

Shutoff valves must be installed at connections to which type of expansion tanks?

A vented self-contained, free-standing, nonrecessed appliance for furnishing warm air to the space in which it is installed, directly from the heater without duct connections, is a:

Where must high-pressure-steam safety valves be vented?

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?

Which appliance may be installed in a sleeping room if it is a direct-vent appliance?

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

When calculating clearances for indoor air-conditioning appliances, if the furnace plenum is adjacent to plaster on metal lath, where is the clearance measured if the specified clearance is 2 inches or less?

Electric duct furnaces must comply with which UL standard?

Household electric ranges must be listed and labeled in accordance with which UL standard?

The category of combustible liquids does not include which of the following?

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

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

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

Joints, seams, and penetrations of grease ducts must be made with a continuous liquid-tight weld or braze made on which surface of the grease duct system?

What is the flammability characteristic of a Class 1 refrigerant?

The passage(s) within an appliance through which combustion products pass from the combustion chamber to the draft hood inlet opening or appliance outlet is the:

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:

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?

Combustion air includes what two components?

Which duty is authorized and directed for the code official regarding permits?

Where a draft hood is required but not supplied by the manufacturer, and no instructions are available, the installed draft hood shall be of the same size as which other appliance component?

Which repair garage is exempt from the requirement for a source capture system for motor vehicle operation?

In an Induced Draft system, the fan, blower, or ejector is located where?

Safety and relief valve discharge piping shall discharge through what device located in the same room as the appliance?

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

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.

Construction documents, engineering calculations, diagrams, and other data shall be submitted with each application for a permit in what minimum number of sets (unless digital submission is allowed)?

For horizontal 1 1/2-inch steel pipe, what is the maximum spacing of supports permitted in feet?

Use of a corridor as a source of makeup air for exhaust systems in adjacent rooms is permitted, provided the corridor is directly supplied with outdoor air at what rate?

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

If the code official determines an installation has become hazardous to life, health, or property, he or she shall order in writing that such installation either be removed or:

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):

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

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?

The concentration of airborne contaminants that poses a threat of death or immediate/delayed permanent adverse health effects is known as what?

For strength testing of refrigeration piping systems, the piping shall be pressurized for a minimum of how many minutes?

Exit and exit access doorways in machinery rooms must swing in the direction of egress travel and be equipped with what, regardless of the occupant load served?

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?

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:

Heat exchangers utilizing a nonfood-grade fluid must be separated from the potable water by what means?

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

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?

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?

Cleanout openings in grease ducts are required to be spaced not more than how many feet apart for sections that are inaccessible from the hood or discharge openings?

The standby power source and its transfer switches for a smoke control system must be enclosed with fire barriers or horizontal assemblies having what minimum fire-resistance rating?

In mechanically ventilated hydrogen-generating locations, equipment and appliances having an ignition source shall be located such that the source of ignition is where relative to the mechanical ventilation outlet(s)?

In multistory common exhaust systems for clothes dryers, the rigid metal ductwork installed within the shaft shall be constructed of sheet steel having a minimum thickness of 0.0187 inch (0.471 mm), which corresponds to what gauge?

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?

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?

Each buffing machine in a tire rebuilding or recapping room must be connected to a dust-collecting system that prevents what?

Duct cleanouts must be located at the base of each vertical duct riser and at intervals not exceeding how many feet in horizontal sections of duct conveying combustible dust?

For permanent ladders installed to provide roof access, what is the minimum clear width required between rails?

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?

A Self-Contained Refrigeration System is factory-assembled and tested, and does not have refrigerant-containing parts joined in the field by other than what?

An appliance converted from the fuel specified on its rating plate for use with a different fuel requires reapproval from whom?

Materials that, where tested in accordance with ASTM E136, meet criteria regarding temperature rise, flaming duration, and weight loss are defined as:

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

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?

Where shall valves NOT be installed on a fuel oil piping system?

Which system is an exception to the requirement that air removed by mechanical exhaust systems must be discharged outdoors?

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?

In a multistory common exhaust system, the exhaust fan must run continuously and be connected to what type of backup system?

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

Chimney connectors are prohibited from passing through which building elements?

What is the primary function of a Control device?

Ambient air that enters a building through a ventilation system, intentional openings for natural ventilation, or by infiltration is defined as what?

What is the minimum clearance required from the sides and rear of an appliance where the original required clearance was 36 inches, and the protection is 0.024-inch sheet metal over 1-inch glass fiber or mineral wool batts with ventilated airspace?

Hazardous exhaust systems that penetrate a floor/ceiling assembly must be enclosed in what structure?

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?

The board of appeals shall be appointed by whom?

The allowable clearance reduction for protective assemblies can be based on a labeled protective assembly that is listed and labeled in accordance with which standard?

What type of firestop system is required for penetrations of a fire-resistance-rated assembly when using a field-applied grease duct enclosure?

For existing buildings identified as historic, the provisions of this code are not mandatory provided the buildings are judged to be safe and in the public interest by the:

What electrical component is required at or near equipment located on a roof or elevated structure?

If a notice of violation is not complied with promptly, the code official shall request the legal counsel of the jurisdiction to institute the appropriate proceeding to restrain, correct, or:

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

Institutional occupancy is defined as premises from which occupants cannot readily leave without the assistance of others because they are disabled, debilitated, or what other condition?

Electric pool and spa heaters must be tested in accordance with which UL standard?

Liquid-level indicating gauges for fuel oil systems must comply with which UL standard?

What is the Refrigerant Safety Group Classification for R-410A (R-32/125, 50.0/50.0)?

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

Elevation of the ignition source is NOT required for appliances that are listed as what?

For pneumatic leak tests where the maximum working pressure is at or above 125 psig (862 kPa gauge), the test pressure shall be not less than what minimum percentage of the maximum working pressure?

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

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

For an appliance installed in a dwelling unit closet, the level service space required at the service side must be not less than 30 inches (762 mm) deep and what minimum height?

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?

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

Large-diameter ceiling fans must be tested and labeled in accordance with AMCA 230, listed and labeled in accordance with UL 507, and installed according to what documentation?

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

Appliances must be supported and connected to the piping so as not to exert undue strain on which components?

Fans providing exhaust or outdoor air in Group R-2, R-3, and R-4 occupancies shall be listed and labeled to provide the minimum required air flow in accordance with which standard?

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?

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?

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

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

Shield plates used to protect clothes dryer exhaust ducts from penetration damage must be of steel material having a minimum thickness of what gauge?

When sizing piping using the Longest Length Method, the pipe size is determined using the longest length of piping from the point of delivery to which point?

What is the minimum testing standard for electric residential clothes dryers?

A pressure regulator for controlling pressure to the manifold of the appliance is a:

What is the minimum clearance required for radiant panels from an element when mounted on wood or steel framing?

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

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?

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:

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?

Pipe and duct insulation contained within plenums shall not flame, glow, smolder, or smoke when tested in accordance with ASTM C411 at what minimum temperature?

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

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

How shall the depth of an opening below grade be measured for natural ventilation requirements?

If a grease duct is large enough for personnel entry, what are the minimum dimensions required for the approved opening in horizontal sections?

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?

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

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?

Where a separate means is used to supply ventilation air to a direct-fired industrial air heater, what must be provided to ensure the main burner does not operate without the air supply?

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

Which of the following pressure vessels are exempt from the scope of Chapter 10?

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?

For a structure with a previously issued lawful permit, construction must have been pursued in good faith within how many days after the effective date of this code to avoid requiring changes?

When utilizing the airflow design method for smoke control, the airflow toward the fire shall not exceed what maximum velocity?

How long shall the code official retain one set of approved construction documents after the date of completion of the permitted work?

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

Mechanical systems that are part of structures moved into or within the jurisdiction shall comply with provisions for which type of installations?

What type of valve is a Safety Valve used in a steam boiler?

If a code provision is less restrictive than the conditions of the listing or the manufacturer’s instructions, which provisions shall apply?

The issuance of a permit or construction documents approval shall not be construed to be a permit for or an approval of any:

The connector shall not be smaller than what dimension provided by the appliance manufacturer?

In a multistory common exhaust system, the finished cleanout opening located at the base of the shaft must be not less than what minimum size?

A valve requiring one-quarter round turn or less to open completely is considered to be what type of valve?

Where demand-controlled ventilation is employed, the minimum quantity of outdoor air shall not fall below that determined from which column of Table 403.3.1.1?

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?

The treatment of air so as to control simultaneously the temperature, humidity, cleanness and distribution of the air to meet the requirements of a conditioned space is defined as:

A Combination Fire/Smoke Damper must be capable of being positioned from where?

Temporary uses, equipment, and systems shall conform to the requirements of this code as necessary to ensure what?

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?

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

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

Steam boilers must be protected with which type of safety device?

In a return air system, where must the smoke detector be installed relative to filters, exhaust air connections, and outdoor air connections?

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:

For naturally ventilated hydrogen-generating operations, where must the upper of the two required permanent openings be located?

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

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?

For fuel-burning units, the required label information includes the hourly rating in Btu/h (W), the required clearances, and what specific fuel detail?

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

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

What is the minimum separation distance required for the atmospheric venting of Compressed Natural Gas (CNG) from buildings?

If a code provision is less restrictive than the conditions of the equipment listing, which requirement shall apply?

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

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

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?

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 outdoor air, and, if applicable, indoor air, is a:

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

Plenums shall be limited to uninhabited crawl spaces, above a ceiling or below the floor, attic spaces, mechanical equipment rooms, and what other construction features?

When interpreting this code, words used in the masculine gender shall be construed to include which other gender(s)?

A Welded Joint is a gastight joint obtained by joining metal parts in what state?

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?

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?

Appliances installed in pits or excavations shall be installed not less than how many inches above the pit floor?

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

Additions, alterations or repairs shall not cause an existing installation to become:

Hydrogen piping systems shall be marked with the name of the contents and a direction-of-flow arrow at intervals not exceeding what maximum distance?

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

Who must be notified prior to making a change of refrigerant in an existing system to a refrigerant with a different refrigerant designation?

Electrical wiring, controls, and connections to equipment and appliances regulated by this code must be in accordance with which standard?

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):

For equipment with a capacity over 20 tons up to 40 tons of refrigeration, what is the minimum required condensate pipe diameter?

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 closed cup flash point range for Class II Combustible Liquids?

Ventilation in dry cleaning plants must be adequate to protect employees and the public in accordance with this section and which other referenced standard, where applicable?

What is the capacity in cfh for 4-inch nominal Schedule 40 metallic pipe at 1,500 feet in length, operating at 2.0 psi inlet pressure with a 1.0 psi pressure drop?

What is excluded from being construed as air ducts in the definition of a Duct?

A blower or fan used for the purpose of distributing supply air to a room, space or area is a(an):

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?

A space is considered indirectly heated or cooled if it is separated from conditioned spaces by what specific feature?

For each elbow up to and including 45 degrees in the common vent of a multiple appliance system, the maximum common vent capacity must be reduced by what percentage?

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?

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?

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

Fasteners used to join domestic dryer exhaust ducts are prohibited from protruding more than what maximum distance into the inside of the duct?

Air removed by mechanical exhaust systems shall not be exhausted into an attic, a crawl space, or be directed onto what other location?

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?

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?

Who is responsible for furnishing the apparatus, instruments, material, and labor required for testing an installation?

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

A Permanent Mechanical Joint that incorporates an elastomeric seal and corrosion-resistant grip or bite ring is called a what?

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?

The procedure by which an approved testing laboratory provides documentation that a product, material or system conforms to specified requirements is defined as:

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

For existing buildings located in flood hazard areas undergoing reconstruction or repair, the code official shall determine if the proposed work constitutes substantial improvement or what?

A Pellet Fuel-Burning Appliance is equipped with what type of mechanism for burning processed pellets of solid fuel?

A burner designed to supply gaseous fuel to an appliance originally designed to utilize another fuel is known as what?

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

A manual or automatic device designed to regulate the gas, air, water or electrical supply to, or operation of, a mechanical system is a:

Materials, equipment, and devices may be reused only if they are in good working condition and:

One set of approved construction documents shall be retained by the code official for a period of not less than how many days from the date of completion of the permitted work?

In the brazing process, how is the filler material distributed between the closely fitted surfaces of the joint?

The inside lower edge of canopy-type Type I and II commercial hoods must overhang or extend a horizontal distance of not less than how many inches beyond the edge of the top horizontal surface of the appliance on all open sides?

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

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

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

Heat-fusion joints for polyethylene pipe used in ground-source loops must be joined in accordance with which ASTM standard?

The term that refers to a blower or fan used for the purpose of distributing supply air to a room, space, or area is what?

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

What is the primary purpose of a Chimney?

The use of what medium is prohibited when removing debris from the interior of a piping system?

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?

Which vented appliance category operates with a nonpositive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent?

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?

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?

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

Chimneys for medium-heat appliances shall extend not less than what horizontal distance higher than any portion of any building within 25 feet?

When calculating the minimum required volume using the Known Air-Infiltration-Rate Method (304.5.2), what is the maximum air infiltration rate (ACH) that shall be used in the equations?

In a High-Probability System, leakage of refrigerant from a failed connection will enter where?

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

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?

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?

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?

Factory-built fireplaces must be listed and labeled and tested in accordance with which UL standard?

What is the maximum capacity in cfh for 4-inch nominal Schedule 40 metallic pipe at 1,500 feet in length, operating at less than 2 psi inlet pressure with a 0.5 in. w.c. pressure drop?

Which type of thermostat is an automatic device, actuated by temperature changes, in which the thermal actuating element is an integral part of the device?

A wall, floor, ceiling or other assembly constructed of one or more component materials that are not defined as noncombustible is a:

A venting system designed to remove flue or vent gases under nonpositive static vent pressure entirely by natural draft is a:

System components that might be subjected to a vacuum during operation or shutdown must either be designed to withstand such vacuum or be protected with what?

A Floor Furnace takes air for combustion from where?

Flue lining systems for use with residential-type and low-heat appliances must resist flue gases and condensate at temperatures up to what maximum temperature?

Equipment and ductwork for exit enclosure ventilation located exterior to the building must be directly connected to the exit enclosure by ductwork enclosed in construction as required by the International Building Code for what purpose?

Tapes and mastics used to seal fibrous glass ductwork must be listed and labeled in accordance with which UL standard?

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

If an attic passageway is unobstructed and not less than 6 feet (1829 mm) high and 22 inches (559 mm) wide, what is the maximum length allowed?

Once issued, approved construction documents shall not be changed, modified, or altered without authorization from the:

What is the capacity in thousands of Btu/h for 1/2-inch nominal copper tubing (K & L) at 500 feet in length, for undiluted propane operating at 10.0 psi inlet pressure with a 1.0 psi pressure drop?

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

For natural gas calculations using the equation factors listed, what is the value designated as Y?

Refrigerants reprocessed to the same specifications as for new refrigerants by means including distillation are classified as what?

Equipment and appliances having an ignition source and located in private garages must be elevated such that the source of ignition is not less than how many inches above the floor surface?

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

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 must oil-fired appliances be equipped with to stop burner operation if the venting system is obstructed?

Grease filters must be installed at a minimum angle of how many degrees from the horizontal?

What is the capacity in thousands of Btu per hour for 1/2-inch nominal O.D. Polyethylene plastic tubing (SDR 7) at 200 feet in length, for undiluted propane operating at 11.0 in. w.c. inlet pressure with a 0.5 in. w.c. pressure drop?

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?

In addition to being experienced in conducting and supervising tests, personnel employed by an approved agency must be educated in evaluating what?

The space surrounding a flue lining system or other vent installed within a masonry chimney shall not be used for what purpose?

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?

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?

According to Table 1009.2, what is the required pressurized diaphragm type expansion tank capacity in gallons for a system volume of 2,000 gallons?

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

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?

Apparatus and devices other than appliances are defined as:

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

What is the minimum clearance required from the sides and rear of a single-wall metal pipe where the original required clearance was 6 inches, and the protection is 0.024-inch sheet metal with ventilated airspace over 0.024-inch sheet metal with ventilated airspace?

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

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.

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

The design and operation of a hazardous exhaust system must ensure that flammable contaminants are diluted to maintain concentrations in the exhaust flow below what percentage of the contaminant’s lower flammability limit (LFL)?

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

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?

Where a vent connector for a Category I appliance with a draft hood passes through an unconditioned space (like an attic) in an area with a 99-percent winter design temperature of 5°F or higher, which type of pipe is permitted to be used within the exterior walls?

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:

When an automatically operated fuel-burning appliance is in operation, an Automatic Vent Damper Device is designed to perform what action?

Duct furnaces shall be listed in accordance with which ANSI/CSA or UL standard?

Refrigerant circuit access ports located outdoors must be fitted with what type of cap?

When testing at a pressure of 10 psig (68.95 kPa gauge) or less, the testing gauge must have increments of what maximum amount?

Air being removed from any space or piece of equipment or appliance and conveyed directly to the atmosphere by means of openings or ducts is defined as:

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

A hearth and fire chamber of solid masonry units or reinforced concrete, provided with a suitable chimney, is a:

Air transferred from occupiable spaces is permitted to serve as makeup air for required exhaust systems in spaces such as kitchens, baths, toilet rooms, elevators, and which other space?

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 ($E_v$)?

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?

In a Low-Probability System, where will a leakage of refrigerant from a failed connection NOT enter?

What type of clearance must chimneys and vents have to combustibles, according to the International Building Code and manufacturer’s instructions?

What inert gas must be used to purge air from piping being brazed to remove oxygen?

What is the purpose of a Flue Liner (Lining)?

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

Exemption from the permit requirements of this code shall not be deemed to grant authorization for work to be done in violation of what?

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

What is the maximum capacity in thousands of Btu/h for 4-inch nominal Schedule 40 metallic pipe at 1,000 feet in length, for undiluted propane operating at 10.0 psi inlet pressure with a 1.0 psi pressure drop?

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

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

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

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

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

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

A hand-operated device that provides a means for connecting and disconnecting an appliance or an appliance connector to a gas supply and is equipped with an automatic means to shut off the gas supply when disconnected is a:

Where single-wall metal pipe passes through a combustible exterior wall serving a listed appliance with a draft hood, the ventilated metal thimble must be not less than 4 inches larger in diameter than the metal pipe, unless a minimum horizontal pipe run of 6 feet is provided in the open, in which case the thimble can be not less than how much larger in diameter than the metal pipe?

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:

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:

A water spray test performed on a grease duct system must use a water pump capable of a flowing outlet pressure of not less than how many PSI?

Shutoff valves are not required in the supply and return piping for a system having which specific type of boiler?

Return air for heating or air-conditioning systems shall not be taken from which two types of locations?

What creates the pressure difference in a Natural Draft system?

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

What is the capacity in cfh for 3-inch nominal Schedule 40 metallic pipe at 1,500 feet in length, operating at 5.0 psi inlet pressure with a 3.5 psi pressure drop?

If equipment replacements or repairs must be performed in an emergency situation, the permit application shall be submitted within what timeframe?

Variable air volume air distribution systems, other than those supplying 100-percent outdoor air, must be provided with controls to regulate the flow of outdoor air to maintain the flow rate at not less than that required by what section?

The aggregate input rating of all unvented appliances installed in a room or space shall not exceed what maximum Btu/h per cubic foot of volume of such room or space?

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?

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?

What is the maximum input rating allowed for a single wall-mounted unvented room heater installed in a bedroom?

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

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?

For all environmental air exhaust, what is the minimum termination distance from mechanical air intakes?

A system or material used to form the inside surface of a flue in a chimney or vent, for the purpose of protecting the surrounding structure and conveying combustion products without leakage, is a:

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?

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

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?

Which of the following is NOT one of the rooms or spaces from which fuel-fired appliances shall not obtain combustion air?

Flexible connectors, expansion, and vibration control devices and fittings must be of what specific characteristic?

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

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:

Raised face flanges shall not be joined to which type of flat-faced flange?

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?

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:

If a notice of violation is not complied with promptly, the code official shall request legal counsel to institute appropriate proceedings at law or in equity to perform what action?

A mechanical system that is unsafe, constitutes a fire or health hazard, or is otherwise dangerous to human life is declared to be what?

What is the capacity in cfh for 1/2-inch nominal Schedule 40 metallic pipe at 700 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?

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?

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:

The imposition of violation penalties shall not preclude the legal officer of the jurisdiction from instituting appropriate action to prevent what?

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?

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:

Permanently installed electric space heaters must be listed and labeled in accordance with which UL standard?

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

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?

After prescribed tests and inspections indicate the work complies, who shall issue a notice of approval?

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

Truss members and components shall not be cut, drilled, notched, spliced, or otherwise altered without whose written concurrence and approval?

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

A Positive Displacement Compressor achieves an increase in pressure by changing what component?

Permanently fixed-in-place outdoor decorative appliances shall be listed in accordance with which ANSI standard?

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?

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

Equipment, appliances, and supports that are exposed to wind must be designed and installed to resist wind pressures determined in accordance with which code?

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

Packaged oil-fired boilers must be listed and labeled in accordance with which UL standard?

What is the maximum pressure for a low-pressure boiler supplying hot water?

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?

A device that functions to maintain a desired draft in the appliance by automatically reducing the draft to the desired value is a:

What is an alternative term sometimes used for Lower Flammable Limit (LFL)?

What is the minimum openable area to the outdoors required for natural ventilation of an occupied space?

Materials, equipment, and devices approved by the code official shall be constructed and installed in accordance with what?

Which vented appliance category operates with a positive vent static pressure and with a vent gas temperature that is capable of causing excessive condensate production in the vent?

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:

Condensate waste and drain line size shall be not less than what minimum pipe size?

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?

When the free area of a louver or grille is not known, what percentage free area shall be assumed for metal louvers and grilles?

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

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

Which valve controls the gas supply to the main burner manifold?

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:

For a single appliance vented by a masonry chimney using a Type B double-wall connector (Table 504.2(3)), if the height (H) is 15 feet and the lateral (L) is 15 feet, what is the minimum input rating (FAN Min) for a 9-inch diameter connector?

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?

What must be excluded from use when calculating required clearances to combustibles?

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

Approved plastic pipe or tubing for heating panels embedded in concrete must be rated at 100 psi (689 kPa) at what specific temperature?

Factory-built chimneys for appliances that operate at a positive vent pressure must be listed for such application in accordance with which UL standard?

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

What phenomenon is NOT listed as a cause of pressure differences resulting in infiltration?

Hydrogen Generating Appliances utilize which of the following processes to generate gaseous hydrogen?

Approved construction documents shall not be changed, modified, or altered without authorization from whom?

If actual flow rate or pressure drop values in a ground-source loop system test differ from calculated design values by more than what percentage, must the cause be identified and corrective action taken?

What must be done to abandoned inlet openings in chimneys and vents?

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

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

Who is responsible for the maintenance of mechanical systems?

For multiple-appliance common venting systems, where the common vertical vent is offset, the maximum capacity of the common vent shall be reduced, and the horizontal length of the offset shall not exceed 1 1/2 feet for each inch of which component diameter?

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

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

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?

What is the maximum operating pressure allowed by these regulations for natural gas piping systems?

Solid-fuel-fired water heaters must comply with which UL standard?

The abbreviation for British thermal unit is:

What is the minimum clearance required above an appliance where the original required clearance was 18 inches, and the protection is 1/2-inch insulation board with ventilated airspace?

Stud wall cavities utilized as air plenums shall not convey air from more than how many floor levels?

Documentation of the final decision of the code official regarding modifications shall be kept in the official records and shall be in what format?

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?

What does this document establish to provide a reasonable level of safety, health, property protection and general welfare?

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

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?

An alternative material, design, or method of construction must comply with:

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

How many members shall the board of appeals consist of?

A low-water cutoff is not required for coil-type and water-tube-type boilers that require forced circulation, provided they are protected with what specific control?

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 decorative appliance is exempt from the requirement to use a flame safeguard device?

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

An attic passageway that is not less than 6 feet high for its entire length shall be not greater than what maximum length?

Air distribution, ventilation, and exhaust systems must be provided with means to adjust the system to achieve the design airflow rates and shall be balanced by what method?

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?

Which types of equipment or appliances require condensate drain systems?

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?