2024 Residential Building Inspector

Residential Building Inspector (B1)

60 Questions

2 Hours

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1. What standard must be used to verify the material identification of load-bearing cold-formed steel roof framing members?

A) AISI S230, Section A4.3

B) AISI S240, Section A3

C) AISI S230, Section A4.4

D) AISI S240, Section A5.5

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2. What is the minimum attachment flange height required for a corrosion-resistant weep screed used in exterior plaster installation?

A) 3 1/2 inches (89 mm)

B) 4 inches (102 mm)

C) 6 inches (152 mm)

D) 2 inches (51 mm)

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3. What is the acceptable minimum and maximum dimension for ventilation openings in enclosed attics or rafter spaces?

A) 3/16 inch minimum and 5/16 inch maximum

B) 1/8 inch minimum and 3/8 inch maximum

C) 1/16 inch minimum and 1/4 inch maximum

D) 1/32 inch minimum and 1/2 inch maximum

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4. What is the minimum required area of an egress window well?

A) 12 Sq. Ft.

B) 9 Sq. Ft.

C) 10 Sq. Ft.

D) 5.7 Sq. Ft.

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5. What is the minimum footing size (width × thickness in inches) required for a 1-story cast in-place concrete with crawl space structure with a 50 psf roof live load and 1,500 psf soil bearing capacity?

A) 14 × 6

B) 18 × 6

C) 14 × 8

D) 19 × 6

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6. What is the maximum stud spacing allowed for Structural Fiberboard Sheathing (SFB) bracing?

A) 16 inches

B) 12 inches

C) 24 inches

D) 32 inches

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7. According to the IRC fastening schedule, what is the required nail type for fastening stud to stud (not at braced wall panels)?

A) 16d common nails

B) 10d common nails

C) 20d common nails

D) 8d box nails

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8. What is the minimum horizontal reinforcement required for a concrete foundation wall with less than 8 feet of unbalanced backfill?

A) Three #5 rebars horizontally

B) Two #4 rebars horizontally

C) No reinforcement required

D) One #4 rebar horizontally

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9. Cold-formed steel roof framing is limited to what maximum ultimate design wind speed under the standard applicability limits?

A) 150 mph

B) 140 mph

C) 120 mph

D) 130 mph

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10. What is the minimum number and size of wood members required in the ledger or roof construction supporting a steel angle?

A) Three 2×4 members

B) Two 2×4 members

C) Three 2×6 members

D) Four 2×8 members

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11. Which ASTM standards are acceptable for water-resistant gypsum backing board used as a base for tile or other nonabsorbent finishes?

A) ASTM C150, C595, or C847

B) ASTM C91, C1328, or C1364

C) ASTM C1178, C1278, or C1396

D) ASTM C1177, C1288, or C1325

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12. How must deck beams be connected to supporting members to prevent lateral displacement?

A) By securing them with toenails at each connection point

B) By bolting them with a minimum of two ½-inch bolts per span

C) By allowing friction and gravity to hold them in place

D) By using manufactured post-to-beam connectors sized for the post and beam sizes

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13. For cold-formed steel framing, what is the minimum thickness required for flat blocking used in ceiling diaphragms?

A) 25 mils

B) 54 mils

C) 43 mils

D) 33 mils

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14. What type of bracing method is used for continuously sheathed portal frames (CS-PF)?

A) CS-WSP

B) CS-G

C) CS-PF

D) See Section R602.10.6.4

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15. Who has the authority to enforce the provisions of the IRC?

A) The building owner

B) The building official

C) The state legislature

D) The general contractor

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16. What is required for sawn lumber to be used for load-supporting purposes?

A) It must be pressure-treated for moisture resistance.

B) It must be manufactured in accordance with ANSI A190.1.

C) It must have “HRA” included in its grade mark.

D) It must have a grade mark from an accredited agency or a certificate of inspection.

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17. Under what condition are secondary (emergency overflow) drains or scuppers required?

A) When the roof perimeter construction extends above the roof and can trap water

B) When internal roof drains are not connected to gutters

C) When the building is taller than two stories

D) When the roof slope exceeds 4:12

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18. What standard must cold-formed steel floor framing members comply with for material thickness and grade requirements?

A) AISI S240, Section A3

B) ASTM A500, Grade B

C) AISI S230, Section A4.3 and A4.4

D) ANSI/TPI 1

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19. When bearing partitions run perpendicular to joists, under what condition can they be offset from supporting girders or walls?

A) They can be offset only if steel reinforcement is installed

B) They can be offset by up to 12 inches without restrictions

C) They cannot be offset under any circumstances

D) They can be offset by more than the joist depth only if the joists are sized to carry the additional load

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20. What is the minimum required compressive strength of concrete used in concrete wall construction?

A) 3,000 psi (20.7 MPa)

B) 2,000 psi (13.8 MPa)

C) 1,500 psi (10.3 MPa)

D) 2,500 psi (17.2 MPa)

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21. Structural wood structural panel sheathing must conform to which standard?

A) ASTM C208

B) ANSI A208.1

C) DOC PS 1, DOC PS 2, CSA O325, or CSA O437

D) ICC 400

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22. What must be installed for precast concrete foundation walls that rest on crushed stone footings and enclose below-grade habitable or usable space?

A) A sealed vapor retarder placed beneath the wall

B) A waterproofing membrane applied to the exterior surface

C) A sump pump with a backup battery system

D) A perforated drainage pipe installed below the base of the wall on either the interior or exterior side of the wall

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23. What is the minimum mortar bed depth required for wall ties embedded in solid masonry units?

A) 1 inch (25.4 mm)

B) 5/8 inch (15.9 mm)

C) 1 1/2 inches (38 mm)

D) 1/2 inch (13 mm)

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24. What is the minimum nominal size and spacing requirement for collar ties?

A) 1×4 inches, spaced 4 feet on center

B) 2×4 inches, spaced 6 feet on center

C) 1×6 inches, spaced 2 feet on center

D) 1×3 inches, spaced 3 feet on center

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25. If roof sheathing is less than 3/4 inch thick, how far must fasteners penetrate?

A) Completely through the sheathing

B) A minimum of 1/2 inch

C) At least halfway through the sheathing

D) Exactly 3/4 inch regardless of sheathing thickness

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26. What vertical reinforcement is required for an 8-inch plain masonry foundation wall with 8 feet of unsupported wall height, 6 feet of unbalanced backfill, and GM soil?

A) No vertical reinforcement required

B) No. 4 bars at 48 inches o.c.

C) No. 5 bars at 48 inches o.c.

D) No. 4 bars at 72 inches o.c.

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27. What qualifies as ‘Noncombustible Material’ in the IRC?

A) A construction material designed for external walls only.

B) Any building material that does not burn within one hour.

C) A material that is covered with fire-resistant paint.

D) A material that passes ASTM E136 fire test.

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28. What is the maximum thickness of cement plaster allowed on monolithic concrete ceilings?

A) 1/2 inch

B) 1/2 inch

C) 3/4 inch

D) 7/8 inch

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29. Who is responsible for maintaining building safety records?

A) The building official

B) The property owner

C) The city mayor

D) The contractor

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30. If a building exceeds the applicability limits, which standard can be used for the design and construction of cold-formed steel wall framing?

A) AISI S240

B) AISI S220

C) AISI S230

D) AISI S250

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31. Who is responsible for ensuring that a building complies with the IRC?

A) The architect

B) The property owner

C) The building contractor

D) The building official

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32. How often must blocking be installed over cantilever bearing supports for cold-formed steel floor joists?

A) Only at the midpoint of the cantilever

B) Every joist

C) Every 6 feet along the span

D) Every other joist

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33. How must a building permit be displayed at a construction site?

A) It must be filed with the final inspection report

B) It must be kept in a secured office

C) It must be displayed at the site in a visible location

D) It does not need to be displayed

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34. What is the minimum size of wood blocking required at the perimeter of a horizontal gypsum board diaphragm ceiling?

A) 1 inch by 4 inches

B) 2 inch by 8 inches

C) 2 inch by 4 inches

D) 2 inch by 6 inches

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35. According to the IRC, how must masonry foundation walls be designed and constructed?

A) Only when project drawings, details, and specifications are sealed by a licensed architect or engineer.

B) In accordance with the provisions of this section of the IRC or TMS 402.

C) Only in accordance with the provisions of the International Residential Code (IRC).

D) Using any general masonry construction method without specific design criteria.

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36. What is the maximum allowable span for wood structural panels with a span rating of 24/16, when used as subfloor sheathing?

A) 24 inches

B) 28 inches

C) 20 inches

D) 16 inches

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37. What is the allowable span for a 550S162-43 ceiling joist at 16-inch spacing with unbraced for a live load of 20 psf?

A) 14'-4"

B) 12'-2"

C) 11'-1"

D) 10'-2"

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38. When is a drainage system NOT required around concrete or masonry foundations?

A) When the foundation is located in a flood-prone area

B) When the foundation includes a waterproof coating

C) When the foundation is installed on well-drained ground or sand-gravel mixture soils classified as Group I soils

D) When the structure is not used for habitable or usable space

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39. What is the minimum required thickness of a granular base placed over compacted earth in a pressure preservative-treated wood floor system?

A) 6 inches (152 mm)

B) 4 inches (102 mm)

C) 3 inches (76 mm)

D) 2 inches (51 mm)

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40. What is the minimum allowable thickness for masonry foundation walls supporting brick veneered frame walls or 10-inch-wide cavity walls when the total wall height does not exceed 20 feet (6096 mm)?

A) 6 inches (152 mm)

B) 12 inches (305 mm)

C) 8 inches (203 mm)

D) 10 inches (254 mm)

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41. What is the required minimum depth of a landing for an exterior egress door?

A) 30 inches

B) 28 inches

C) 36 inches

D) 24 inches

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42. What is the maximum allowable span for a 2×10 Douglas Fir-Larch #1 joist at 16-inch spacing with a 10 psf dead load when supporting sleeping areas?

A) 16 feet 5 inches

B) 20 feet 1 inch

C) 14 feet 8 inches

D) 18 feet 5 inches

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43. In soils other than Group I, what is the minimum required size of a sump used to drain the porous layer and footings in wood foundations?

A) 24 inches (610 mm) in diameter or 20 inches (508 mm) square

B) 12 inches (305 mm) square

C) No specific size requirement, as long as it provides adequate drainage

D) 18 inches (457 mm) in diameter

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44. Which ASTM standard applies to adhered manufactured stone masonry veneer units?

A) ASTM C1364

B) ASTM C1405

C) ASTM C1088

D) ASTM C1670

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45. What test standards must garage doors meet to demonstrate compliance with design wind pressure requirements?

A) ASTM E1996

B) AAMA/WDMA/CSA 101/I.S.2/A440

C) ASTM E330 or ANSI/DASMA 108

D) ASTM E1886

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46. What is the required screw spacing when installing 1/2-inch gypsum board to ceiling framing spaced 16 inches on center, applied parallel to framing, without adhesive?

A) 12 inches

B) 10 inches

C) 16 inches

D) 8 inches

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47. What is the maximum allowable variation from the specified location of vertical reinforcement in basement walls?

A) 15 percent of the wall thickness or ½ inch (13 mm), whichever is greater.

B) 10 percent of the wall thickness or ⅜ inch (10 mm), whichever is greater.

C) No variation is allowed; reinforcement must be placed exactly as specified.

D) 5 percent of the wall thickness or ¼ inch (6 mm), whichever is greater.

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48. When a header joist span exceeds 4 feet, what is required?

A) The use of engineered lumber for added strength

B) Doubled trimmer joists and a doubled header joist of sufficient cross-section

C) A metal connector to reinforce the header joist

D) A single header joist of the same size as the floor joist

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49. What is the required slope of impervious surfaces for site drainage away from a foundation?

A) 10%

B) 2%

C) 1:10

D) 5%

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50. What is the presumptive load bearing capacity of Sandy Gravel?

A) 2500 psf

B) 2000 psf

C) 1500 psf

D) 3000 psf

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51. According to the IRC, what design loads must decks be designed for?

A) A minimum live load of 30 psf

B) The greater of the live load in Section R301.5 or the ground snow load from Table R301.2

C) The dead load of the decking and joists only

D) The local wind load as determined by ASCE 7

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52. What is the maximum height for a residential handrail?

A) 28 inches

B) 42 inches

C) 34 inches

D) 38 inches

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53. A 2-2×6 header in a 12-foot-wide building supports a roof and ceiling with a 70 psf ground snow load. What is the maximum span allowed?

A) 4'-5"

B) 3'-10"

C) 4'-6"

D) 3'-6"

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54. What is the maximum allowable span for a 2×8, #2 grade Douglas fir-larch rafter spaced 16 inches apart, with a dead load of 20 psf, ceiling not attached, and a roof live load of 20 psf?

A) 19'-6"

B) 22'-6"

C) 16'-0"

D) 18'-5"

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55. What must be ensured regarding the continuity of vertical reinforcement in concrete walls between stories?

A) It must be connected with welded wire mesh

B) It must align with corners only

C) It may terminate at floor level without overlap

D) It must be continuous between stories or properly lap-spliced with dowels

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56. What is the maximum allowed plan dimension for buildings constructed with exterior concrete walls under the IRC?

A) 40 feet (12 192 mm)

B) 70 feet (21 336 mm)

C) 50 feet (15 240 mm)

D) 60 feet (18 288 mm)

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57. What is the maximum allowable slope for a ramp not serving an egress door?

A) 1:6

B) 1:12

C) 1:10

D) 1:8

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58. How far from the firebox opening can the exterior air outlet be located, if not within the firebox?

A) No more than 18 inches

B) No restriction applies

C) No more than 12 inches

D) No more than 24 inches

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59. For a 8-inch nominal flat concrete basement wall with 10 feet of unsupported wall height, 9 feet of unbalanced backfill, and GP soil, what is the minimum required vertical reinforcement?

A) No. 6 bars at 24 inches o.c.

B) No. 6 bars at 18 inches o.c.

C) No. 6 bars at 22 inches o.c.

D) No. 6 bars at 34 inches o.c.

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60. What is the minimum required coverage of rebar in concrete cast against the earth?

A) 3 inches

B) 4 inches

C) 8 inches

D) 6 inches

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