New Mexico CID GB-98 General Building Contractor Examination

Per 2021 IRC R401.3, lots shall be graded so the finish grade falls a minimum of how much within the first 10 feet away from the foundation wall?

• A2 inches
• B4 inches
• C6 inches
• D12 inches

Per 2021 IRC R403.1.6, wood sill plates on a continuous concrete foundation shall be anchored with bolts of at least which diameter?

• A3/8 inch
• B1/2 inch
• C5/8 inch
• D3/4 inch

Per 2021 IRC R403.1.6, what is the maximum on-center spacing of foundation anchor bolts along a wood sill plate?

• A4 feet
• B6 feet
• C8 feet
• D10 feet

A 40-foot continuous treated sill plate is set on a residential stem wall. Using 2021 IRC R403.1.6 (6-foot maximum spacing and one bolt within 12 inches of each end), what is the minimum number of 1/2-inch bolts required?

• A6 bolts
• B7 bolts
• C8 bolts
• D9 bolts

A residential footing trench is 45 feet long, 2 feet wide, and 18 inches deep. How many cubic yards of excavation are in the trench (bank measure, no swell)?

• A3.3 cubic yards
• B4.0 cubic yards
• C5.0 cubic yards
• D6.8 cubic yards

Per 2021 IRC R506.1, what is the minimum thickness of a concrete slab-on-grade floor?

• A2-1/2 inches
• B3 inches
• C3-1/2 inches
• D4 inches

A No. 5 reinforcing bar has which nominal diameter?

• A3/8 inch
• B1/2 inch
• C5/8 inch
• D3/4 inch

Per ACI 318 cover rules used with the IRC/IBC concrete chapters, what is the minimum concrete cover for reinforcement cast against and permanently exposed to earth?

• A3/4 inch
• B1-1/2 inches
• C2 inches
• D3 inches

A 24-foot by 36-foot residential garage slab is 4 inches thick. How many cubic yards of concrete are required, with no waste allowance?

• A8.0 cubic yards
• B10.7 cubic yards
• C12.0 cubic yards
• D14.2 cubic yards

A contractor will place 240 lineal feet of No. 4 bars in a residential footing. Using 0.668 pounds per foot for No. 4 bar, what is the steel weight to the nearest pound?

• A80 pounds
• B120 pounds
• C160 pounds
• D250 pounds

Per ASTM C270, what is the minimum 28-day compressive strength of Type N masonry mortar?

• A350 psi
• B750 psi
• C1,800 psi
• D2,500 psi

Which ASTM C270 mortar type is the usual choice for a load-bearing concrete-masonry foundation wall at or below grade?

• AType O
• BType N
• CType S
• DType K

A residential CMU wall is 8 feet high and 40 feet long, laid in 8-inch-high by 16-inch-long nominal block. Ignoring openings and waste, how many blocks are required?

• A240 blocks
• B360 blocks
• C450 blocks
• D512 blocks

Per 2021 IRC R311.7.1, what is the minimum clear width of a residential stairway above the permitted handrail height?

• A32 inches
• B36 inches
• C42 inches
• D44 inches

NMAC 14.7.3.11 deletes IRC R311.7.5.1 and substitutes New Mexico text. What is the maximum riser height of a dwelling stair built under the 2021 New Mexico Residential Building Code?

• A7 inches
• B7-3/4 inches
• C8 inches
• D8-1/4 inches

NMAC 14.7.3.11 deletes IRC R311.7.5.2 and substitutes New Mexico text. What is the minimum tread depth of a dwelling stair built under the 2021 New Mexico Residential Building Code?

• A8 inches
• B9 inches
• C10 inches
• D11 inches

Per 2021 IRC R502.8.1, a notch in the top or bottom of a floor joist, other than at the ends, shall not exceed what fraction of the joist depth and shall not be located in the middle third of the span?

• A1/8 of the depth
• B1/6 of the depth
• C1/4 of the depth
• D1/3 of the depth

Per 2021 IRC R312.1.2, required guards at open-sided walking surfaces of a dwelling shall be not less than which height?

• A34 inches
• B36 inches
• C38 inches
• D42 inches

How many board feet are in 80 pieces of 2×10×16 framing lumber?

• A1,067 board feet
• B1,600 board feet
• C2,133 board feet
• D2,560 board feet

A 2×12 floor joist has an actual depth of 11-1/4 inches. Per 2021 IRC R502.8.1, what is the maximum diameter of a bored hole in that joist?

• A2-13/16 inches
• B3 inches
• C3-3/4 inches
• D4-1/2 inches

Per 2021 IRC R905.2.2, asphalt shingles shall not be installed on roof slopes below which minimum?

• A1:12
• B2:12
• C3:12
• D4:12

Per 2021 IRC R905.1.1, asphalt-shingle roofs with a slope of 2:12 up to but not including 4:12 require which underlayment application?

• ANo underlayment if self-seal shingles are used
• BA single layer of underlayment lapped 2 inches
• CTwo layers of underlayment applied shingle fashion
• DA fully adhered peel-and-stick membrane over the entire roof only

Per 2021 IRC R903.2.1, locations where there is a change in roof slope or where the roof abuts a vertical sidewall typically require which flashing?

• ADrip edge only
• BStep flashing or continuous flashing as required for the condition
• CA cricket only if the wall is less than 30 inches wide
• DNo flashing if underlayment is doubled

Per 2021 IRC R806.2, the minimum net free ventilating area of a vented attic is generally 1/150 of the vented space, but it may be reduced to which ratio when at least 40 percent and not more than 50 percent of the required ventilating area is provided by ventilators located in the upper portion of the attic?

• A1/100
• B1/150 still required
• C1/300
• D1/600

A rectangular roof measures 30 feet by 40 feet in plan and has a 4:12 slope. Using the slope factor 1.054 for 4:12, what is the roof surface area to the nearest square foot?

• A1,200 square feet
• B1,265 square feet
• C1,333 square feet
• D1,440 square feet

A 4:12 asphalt-shingle roof has a plan area of 2,400 square feet. Using a 1.054 slope factor and 10 percent waste, how many roofing squares should be ordered?

• A24 squares
• B25 squares
• C28 squares
• D32 squares

Per 2021 IRC R703.7.2.1, a weep screed at the bottom of exterior cement plaster shall be placed a minimum of how far above the earth?

• A1 inch
• B2 inches
• C4 inches
• D6 inches

Per 2021 IRC R314, smoke alarms in a new dwelling are required in each sleeping room, outside each separate sleeping area, and in which additional location?

• AOnly in the garage
• BOnly in unfinished attics
• COn each additional story of the dwelling, including basements and habitable attics but no…
• DOnly at the service-panel location

Per 2021 IRC R315.3, where is a carbon monoxide alarm required in a new dwelling that contains a fuel-fired appliance?

• AOnly inside each sleeping room
• BOutside each separate sleeping area in the immediate vicinity of the bedrooms
• COnly in the mechanical room
• DOnly at the attached-garage vehicle door

Per 2021 IRC R308.4, glazing in which of the following locations is a hazardous location that generally requires safety glazing?

• AA transom 80 inches above the walking surface and more than 24 inches from a door
• BA window with a bottom edge 18 inches above the floor, a top edge 66 inches above the flo…
• CA clerestory 8 feet above the floor with no walking surface within 36 inches
• DInsulating glass in an upper-story bedroom 42 inches above the floor and 48 inches from a…

Per 2021 IRC R317.1, wood joists or the bottom of a wood structural floor closer than which distance to the exposed ground in a crawl space shall be of approved naturally durable or preservative-treated wood?

• A6 inches
• B8 inches
• C12 inches
• D18 inches

Per 2021 IRC R302.11, fireblocking in concealed spaces of stud walls and partitions shall be provided vertically at the ceiling and floor levels and horizontally at intervals not exceeding which distance?

• A4 feet
• B8 feet
• C10 feet
• D16 feet

A two-story dwelling has 1,200 square feet of ceiling area over a vented attic. Using the 2021 IRC R806.2 reduction to 1/300 because 40 to 50 percent of the vents will be high, what net free ventilation is required?

• A2.0 square feet
• B4.0 square feet
• C8.0 square feet
• D12.0 square feet

On a plan drawn at a scale of 1/4 inch = 1 foot 0 inches, a wall that measures 3-1/2 inches on the sheet is how long in the field?

• A7 feet
• B10 feet
• C14 feet
• D28 feet

Per 2021 IRC Table R301.5, what is the minimum uniformly distributed live load for residential habitable attics and sleeping rooms?

• A10 psf
• B20 psf
• C30 psf
• D40 psf

Per 2021 IRC Table R301.5, what uniformly distributed live load is used for residential rooms other than sleeping rooms?

• A20 psf
• B30 psf
• C40 psf
• D50 psf

A set of residential plans is drawn at 1/4 inch = 1 foot 0 inches. A concrete patio measures 2-1/4 inches by 3 inches on the sheet. What is the patio area?

• A54 square feet
• B81 square feet
• C108 square feet
• D162 square feet

Per 2021 IRC R311.7.8, handrail height shall be not less than 34 inches and not more than which height, measured from the nosing of the treads?

• A36 inches
• B38 inches
• C42 inches
• D44 inches

A 40-foot-long floor is framed with joists at 16 inches on center. Including the starter joist and with no doubled headers or openings, how many joists are required along that 40-foot run?

• A28 joists
• B30 joists
• C31 joists
• D40 joists

A rectangular excavation for a dwelling basement is 32 feet by 48 feet in plan and 8 feet deep. How many cubic yards of bank excavation is that, with no swell or working room?

• A341 cubic yards
• B455 cubic yards
• C512 cubic yards
• D683 cubic yards

Per OSHA 29 CFR 1926.501(b)(1), each employee on a walking-working surface with an unprotected side or edge 6 feet or more above a lower level shall be protected by a guardrail system, safety net system, or which other system?

• AA warning line 15 feet from the edge only
• BA personal fall-arrest system
• CA monitor with no other equipment on any roof
• DA toeboard used alone

Per OSHA 29 CFR 1926.502(b)(1), the top-edge height of a guardrail system shall be 42 inches plus or minus how many inches above the walking-working surface?

• A1 inch
• B2 inches
• C3 inches
• D6 inches

Per OSHA 29 CFR 1926.652(a)(1), each employee in an excavation shall be protected from cave-ins by an adequate protective system unless the excavation is made entirely in stable rock or is less than which depth and a competent person finds no indication of a potential cave-in?

• A4 feet
• B5 feet
• C6 feet
• D8 feet

Per OSHA 29 CFR 1926.651(c)(2), a stairway, ladder, ramp, or other safe means of egress shall be located in trench excavations that are 4 feet or more in depth so as to require no more than how much lateral travel?

• A15 feet
• B25 feet
• C50 feet
• D75 feet

Per 2021 IBC 1804.4, the ground immediately adjacent to a commercial foundation shall be sloped away from the building at not less than 1 unit vertical in 20 units horizontal (5-percent slope) for a minimum distance of how far?

• A5 feet
• B10 feet
• C15 feet
• D20 feet