CSLB B-2 Residential Remodeling (Trade Exam) — All Questions
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63 questions
Where fireblocking is required in a wall, which opening must be sealed?
- a.Door hardware bores in interior doors
- b.Window openings along exterior walls
- c.Penetrations by pipes, wires and ducts✓
- d.Hairline cracks in the wall paint
Wires, pipes and ducts passing through at floor and ceiling levels have their openings filled with a code-listed material. Window openings, door hardware bores and paint cracks are not fireblocking locations.2025 CRC R302.11
A 1/2-inch ceiling board is screwed to framing 24 inches on center, applied perpendicular. What is the maximum screw spacing?
- a.12 inches✓
- b.8 inches
- c.7 inches
- d.16 inches
The table shows screws at 12 inches on such ceilings. Seven inches is the nail spacing, and 8 and 16 inches are wall spacings.2025 CRC Table R702.3.5
Where may interior gypsum board not be used?
- a.In a hallway between two bedrooms and the bath
- b.Where directly exposed to weather or water✓
- c.Above a closet
- d.In a bedroom
Interior gypsum board is not used where directly exposed to weather or water. Hallways, bedrooms and above closets are ordinary dry interior locations.2025 CRC R702.3.5
A closet under a stair has a door. What wall protection is required?
- a.1/2-inch gypsum board✓
- b.A layer of plywood sheathing
- c.A layer of rigid foam board
- d.No protection is required there
Enclosed space under stairs reached by a door has 1/2-inch gypsum board on the enclosed side. Nothing, plywood and foam board do not meet the rule.2025 CRC R302.7
Interior nonbearing partitions must be capped with what?
- a.A concrete cap
- b.A metal strap tie, no wood plate
- c.No plate of any kind at the top
- d.At least a single top plate✓
Nonbearing partitions are capped with at least a single top plate. Having no plate, a strap alone or a concrete cap is not what the CRC calls for.2025 CRC R602.5
A stair rises 7 feet 6 inches (90 inches). What is the minimum number of risers with a 7-3/4 inch maximum?
- a.13
- b.12✓
- c.11
- d.10
90 ÷ 7.75 = 11.6, so at least 12 risers (7.5 inches each). Eleven would need an 8.2-inch riser, ten is far too few and 13 is not the minimum.2025 CRC R318.7.5.1
What is the minimum clear stair width above handrail height?
- a.31-1/2 inches
- b.36 inches✓
- c.42 inches
- d.27 inches
Stairs are at least 36 inches clear above handrail height. Thirty-one and a half and 27 inches apply at and below handrail height, and 42 inches is more than the minimum.2025 CRC R318.7.1
What is the minimum headroom on a stairway?
- a.8 feet
- b.7 feet 6 inches or more
- c.6 feet
- d.6 feet 8 inches✓
Headroom is not less than 6 feet 8 inches. Six feet is too low, and 7 feet 6 inches and 8 feet are above the minimum.2025 CRC R318.7.2
On a stair, how much may the largest riser exceed the smallest in a flight?
- a.1/4 inch
- b.1-1/2 inches
- c.3/4 inch
- d.3/8 inch✓
The greatest riser may exceed the smallest by no more than 3/8 inch in a flight. One quarter, three quarters and 1-1/2 inches are not the stated variation.2025 CRC R318.7.5.1
A round handrail has a 1-3/4 inch diameter. What is the finding?
- a.It is too large to meet the range
- b.It meets the Type I range✓
- c.It is too small to meet the range
- d.Round handrails are not allowed in homes
A Type I round handrail is 1-1/4 to 2 inches in outside diameter, so 1-3/4 inches is acceptable. It is not too small or too large, and round rails are allowed.2025 CRC R320.6
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What is the minimum width of a stair landing in a straight run?
- a.At least as wide as the flight, and 36 inches deep✓
- b.60 inches
- c.As wide as the door and 12 inches deep in a straight run
- d.24 inches
A landing is at least as wide as the flight it serves and 36 inches deep in a straight run. Twelve and twenty-four inches are too small, and 60 inches is more than the minimum.2025 CRC R318.7.6
A floating engineered floor is installed with a 5/16-inch perimeter gap in a product whose maker requires 1/2 inch. What is the finding?
- a.The installation does not follow the maker's instructions✓
- b.It is acceptable because 5/16 is common
- c.It needs no gap because the floor floats
- d.It meets the code, so no change is needed
The maker's instructions govern its own product, so a gap that does not match them does not comply. It is not covered by the code, 5/16 inch is not acceptable just because another maker uses it, and a gap is needed.Manufacturer installation guides (engineered hardwood)
Interior hardwood plywood and particleboard must comply with what California rule?
- a.Lead rules
- b.Formaldehyde limits✓
- c.Termite rules
- d.Sound transmission ratings
Those products comply with the formaldehyde limits in the green building code. Sound ratings, termite rules and lead rules are unrelated to composite wood emissions.CALGreen 4.504.5 (per City of Rancho Cucamonga handout)