Nevada C-3 Carpentry, Maintenance and Minor Repairs Contractor Examination

Under OSHA 29 CFR 1926.501, when must a carpenter on a walking/working surface with an unprotected side or edge be protected from falling by a guardrail, safety net, or personal fall-arrest system?

• AWhen the surface is 6 feet or more above a lower level
• BOnly when the surface is 10 feet or more above a lower level
• COnly when the surface is 4 feet or more above a lower level
• DOnly after the roof sheathing is complete

When must hard hats be worn on a C-3 framing or formwork site under OSHA 1926.100?

• AOnly when the competent person is on site
• BWhenever there is a possible danger of head injury from impact, falling or flying objects…
• COnly during crane picks
• DOnly after a first-aid incident has occurred

What is the required top-edge height of a construction guardrail system under OSHA 1926.502(b)?

• A36 inches exactly
• B30 inches plus or minus 2 inches
• C42 inches plus or minus 3 inches above the walking/working level
• D48 inches minimum with no upper limit

A portable extension ladder is used to reach a second-story landing. How far must the side rails extend above that landing under OSHA 1926.1053?

• AAt least 3 feet above the upper landing surface
• BFlush with the landing so the ladder does not trip anyone
• CAt least 12 inches above the landing
• DAt least 6 feet above the landing

What is the OSHA 1926.1053 setup angle for a non-self-supporting portable ladder?

• A1 foot out for every 2 feet of working length
• B1 foot out for every 4 feet of working length (approximately 75 degrees)
• C1 foot out for every 8 feet of working length
• DPlumb against the wall with the base touching the siding

What is the minimum strength OSHA 1926.502(d) requires of an anchorage used for a personal fall-arrest system, unless it is designed and installed as part of a complete PFAS with a safety factor of at least two?

• A200 pounds per worker
• B1,800 pounds per worker
• C5,000 pounds per employee attached
• D10,000 pounds regardless of the number of workers

A carpenter is working on a supported scaffold platform 12 feet above grade. Which OSHA rule governs when fall protection is required on that scaffold?

• A1926.501's 6-foot walking-surface rule applies unchanged to every scaffold
• B1926.451(g) requires fall protection on scaffolds more than 10 feet above a lower level
• CScaffolds need fall protection only above 25 feet
• DNo fall protection is required if the platform is fully planked

Under OSHA 1926.304, what must remain in place while a portable circular saw is used to rip framing lumber?

• AOnly the lower blade guard, which may be wired back for long rips
• BThe saw's blade guard, which must automatically return to covering the unused portion of…
• CA shop-made wooden push stick in place of the guard
• DNo guard is required if the operator wears a face shield

When must eye or face protection be worn during C-3 carpentry under OSHA 1926.102?

• AOnly when using powder-actuated tools
• BWhenever machines or operations present potential eye or face injury from physical, chemi…
• COnly if the employer provides prescription safety glasses
• DOnly during demolition, not during new framing

A C-3 crew is building wall forms for a cast-in-place stem wall. What does OSHA 1926.703 require of that formwork?

• AForms may be any scrap plywood as long as they hold a visual alignment
• BFormwork must be designed, fabricated, erected, supported, braced, and maintained so it w…
• CForms only need to resist the weight of the wet concrete, not wind or construction live l…
• DA competent person may waive engineered form design for any pour under 8 feet

What does the R-value of building insulation measure?

• AThermal resistance to heat flow
• BThe flame-spread index under ASTM E84
• CVapor permeance in perms
• DCompressive strength of the batt

A 2x4 wall cavity is 3-1/2 inches deep. What happens if an R-19 fiberglass batt made for a 5-1/2-inch 2x6 cavity is stuffed into that 2x4 stud bay?

• AThe installed R-value stays R-19 because the label is printed on the facing
• BThe batt is compressed, trapped air is reduced, and the installed R-value drops below R-19
• CCompression increases R-value because the fibers become denser
• DThe kraft facing automatically upgrades the assembly to a fireblock

What is the primary purpose of weatherstripping and exterior caulking on windows and doors under the C-3 scope?

• ATo increase the fire-resistance rating of the opening
• BTo control air and water infiltration at the operable or framed opening
• CTo replace the need for flashing and a water-resistive barrier
• DTo structurally fasten the unit to the king studs

Under IBC 2018 Section 1030, what are the minimum net-clear opening size and maximum sill height for an emergency-escape and rescue opening that is not at grade?

• A4.0 square feet of net clear area, 18-inch height, 18-inch width, 48-inch sill
• B5.7 square feet of net clear area, 24-inch minimum height, 20-inch minimum width, and a s…
• C9.0 square feet of net clear area, 30-inch height, 30-inch width, 36-inch sill
• D5.0 square feet of net clear area at every story, with no sill-height limit

Where IBC 2018 Section 2406 requires safety glazing, which location is a hazardous location that needs safety glass?

• AA transom lite more than 60 inches above the walking surface and not in a door
• BGlazing in a swinging door, and glazing next to a door where the nearest exposed edge is…
• CAny window in a sleeping room regardless of size or height
• DOnly skylights; door lites may be ordinary annealed glass

Under NAC 624.210, which items are part of C-3 overhead-door work?

• AOnly the door curtain; tracks must be installed by an elevator contractor
• BGuides, counterweights, tracks, weatherstripping, and automatic or manual controls appurt…
• CThe fire-sprinkler riser that serves the door opening
• DCeramic tile on the apron in front of the door

When setting a flanged window in a wood-frame wall, what is the correct water-management sequence at the rough opening?

• ANail the window first, then apply housewrap over the head flange only, with no sill pan
• BInstall the water-resistive barrier and a sloped or pan-flashed sill, set the window, the…
• CCaulk all four sides of the flange solid, including the bottom, so no water can drain
• DRely on interior trim and no exterior flashing because the unit is labeled 'self-flashing'

What are the actual dressed dimensions of a standard dry 2x4 stud used in conventional framing?

• A2 inches by 4 inches
• B1-1/2 inches by 3-1/2 inches
• C1-3/4 inches by 3-3/4 inches
• D1-1/4 inches by 3-1/4 inches

In conventional wood-frame walls sheathed with 4-foot-wide wood structural panels, what stud spacing is the usual layout that lands panel edges on studs?

• A12 inches on center only
• B16 inches on center
• C32 inches on center
• D36 inches on center

When setting sawn floor joists or studs, which way should the crown (the slight edge bow) be oriented?

• ACrown down so the member can settle flat
• BCrown up (convex edge up) so occupancy load tends to straighten the member
• CCrowns alternating up and down to average out
• DCrown toward the nearest bearing wall

When framing a window or door opening in a load-bearing wall, which member sits under each end of the header and carries the header load down to the sole plate?

• ACripple stud
• BKing stud only
• CJack (trimmer) stud
• DRibbon board

Per IBC 2018 2308.4.2.4, a notch in the top or bottom of a solid-sawn floor joist away from the ends must not exceed what portion of the joist depth, and where is it prohibited?

• AOne-half the depth, anywhere in the span
• BOne-sixth the depth, and not in the middle third of the span
• COne-third the depth, only in the middle third
• DOne-fourth the depth, only at midspan

A plumber wants to bore a hole through a 2x10 floor joist (actual depth 9-1/4 inches). What is the IBC 2018 2308.4.2.4 maximum hole diameter, and how far must the hole stay from the top or bottom edge?

• A4-1/2 inches, and it may touch the edge
• BAbout 3-1/8 inches (one-third of 9-1/4 inches), and not closer than 2 inches to the top o…
• C1-1/2 inches, anywhere in the joist
• DThe full 9-1/4-inch depth if a metal nail plate is added

Under IBC 2018 2308.5.9, what is the maximum notch depth in a wood stud in an exterior or bearing wall?

• A25 percent of the stud width
• B40 percent of the stud width
• C60 percent of the stud width
• DAny depth if a steel stud shoe is added later

Per IBC 2018 2308.5.10, which bored-hole rule applies to wood studs?

• AHoles may be any size if they are centered
• BHoles up to 40 percent of stud width are permitted in any wood stud; holes up to 60 perce…
• CHoles are limited to 25 percent of stud width in every wall
• DHoles are prohibited in 2x4 studs

In combustible construction, IBC 2018 718.2 requires fireblocking to cut off concealed draft openings. At what maximum horizontal interval must concealed stud spaces be fireblocked?

• AEvery 4 feet
• BEvery 10 feet
• CEvery 20 feet with no other limits
• DOnly at the roof ridge

Which material is listed in IBC 2018 718.2.1 as an acceptable fireblocking material?

• ATwo-inch nominal lumber
• BSingle-layer 1/4-inch lauan underlayment
• CKraft-faced fiberglass batts laid loosely on the sole plate
• DBuilding paper folded into the bay

Per IBC 2018 2304.12.1.1, when must wood floor joists or wood girders in a crawl space be naturally durable or preservative-treated?

• AJoists closer than 18 inches, or girders closer than 12 inches, to exposed ground
• BOnly if the crawl space has no vapor retarder
• CJoists closer than 6 inches and girders closer than 4 inches to ground
• DNever; kiln-dried Hem-Fir is always permitted at grade

Wood framing or sheathing in contact with an exterior foundation wall must be naturally durable or preservative-treated when it is less than how far from exposed earth, per IBC 2018 2304.12.1.2?

• A4 inches
• B8 inches
• C18 inches
• D24 inches

Per IBC 2018 2308.5.3.2, how must end joints in double top plates of bearing and exterior walls be arranged?

• AJoints may stack over the same stud
• BEnd joints shall be offset not less than 48 inches and plates shall overlap at corners an…
• CA single 1x4 ribbon may replace both plates
• DJoints must land only at window headers

Joists framing from opposite sides over a wood beam or partition must be lapped at least how far, or else tied together in an approved manner, per IBC 2018 2308.4.2.3?

• A1 inch
• B3 inches
• C12 inches
• DThey must never lap; butt them on the beam centerline

Per IBC 2018 2308.4.4, when must trimmer and header joists at a floor opening be doubled, and when do header ends need hangers or framing anchors?

• ADouble them only if the opening is a stair; hangers are never required
• BDouble trimmer and header joists where the header span exceeds 4 feet; support header end…
• CSingle joists are always enough if they are 2x12s
• DHeaders longer than 2 feet must be steel

How many board feet are in 24 pieces of 2x10 lumber, each 16 feet long? (Board feet = thickness × width × length in feet ÷ 12.)

• A320 board feet
• B480 board feet
• C640 board feet
• D768 board feet

A commercial stair has a 108-inch floor-to-floor rise. Using IBC 2018 1011.5.2 (maximum 7-inch riser), what is the smallest number of risers that works, and what is the resulting riser height?

• A14 risers at 7.71 inches
• B15 risers at 7.20 inches
• C16 risers at 6.75 inches
• D18 risers at 6.00 inches

What are the IBC 2018 1011.5.2 limits for rectangular stair riser height and tread depth (the open-book C-3 reference)?

• ARiser 7-3/4 inches maximum, tread 10 inches minimum (IRC dwelling figures)
• BRiser 7 inches maximum and 4 inches minimum; rectangular tread 11 inches minimum
• CRiser 8 inches maximum; tread 9 inches minimum
• DNo dimensional limits if a handrail is installed

Within one flight, how much may the largest riser differ from the smallest, and the largest tread from the smallest, under IBC 2018 1011.5.4?

• A1/8 inch
• B3/8 inch
• C3/4 inch
• D1 inch

A carpenter checks a foundation for square before setting sill plates. Which 3-4-5 layout is a true right triangle?

• A3 feet, 4 feet, and 6 feet
• B6 feet, 8 feet, and 10 feet
• C5 feet, 5 feet, and 8 feet
• D4 feet, 4 feet, and 4 feet

A plumber asks the C-3 carpenter to cut a hole through a metal-plate-connected wood-truss web for a vent. What does IBC 2018 2303.4.5 require?

• AAny hole under 1-1/2 inches is automatically permitted
• BTruss members shall not be cut, notched, drilled, spliced, or otherwise altered without w…
• CThe hole is allowed if it is in the middle of the web
• DField-cut the web and sister a 2x4 beside the plate

What documents must arrive with metal-plate-connected wood trusses and be available on site under IBC 2018 2303.4?

• AOnly a delivery ticket listing the number of trusses
• BEach truss design drawing, a truss placement diagram, and the permanent individual-member…
• CA photocopy of the BCSI cover page only
• DNothing; the building permit drawing replaces truss shop drawings

For metal-plate-connected wood trusses with a clear span of 60 feet or greater, IBC 2018 2303.4.1.3 requires which additional step?

• AThe owner or owner's agent shall contract with a qualified registered design professional…
• BThe delivery driver may design the bracing on the tailgate
• CNo bracing is required because long trusses are stiffer
• DOnly bottom-chord strapping is required, and only after drywall

A wood structural panel is stamped 32/16. What do those numbers mean under IBC 2018 Table 2304.8(3)?

• AThe panel is 32 inches wide and 16 inches thick
• BMaximum roof span 32 inches and maximum floor span 16 inches, strength axis perpendicular…
• CMaximum wall stud spacing 32 inches and nail spacing 16 inches
• DThe panel contains 32 plies and is rated for 16 psf

What bond classification does IBC 2018 2304.8.2 require for wood structural panel roof sheathing?

• AInterior-only glue is acceptable if felt is applied the same day
• BExposure 1 or Exterior (manufactured with exterior glue)
• CAny underlayment-grade particleboard
• DFire-retardant-treated only, in every construction type

For 3/8- to 1/2-inch wood structural panel roof sheathing, IBC 2018 Table 2304.10.1 commonly specifies 8d common nails at what spacing?

• A12 inches at edges and 24 inches in the field
• B6 inches at supported edges and 12 inches at intermediate supports
• C4 inches everywhere
• DNails are optional if construction adhesive is used

Per IBC 2018 2304.3.1 and 2308.5.3.1, what is the minimum bottom plate or sill under wood studs?

• AA 1x4 let-in ribbon
• BA 2-inch-thick (actual 1-1/2-inch) or larger plate or sill at least as wide as the studs,…
• CGypsum board laid flat on the slab
• DNo plate is required if studs are toenailed to the slab

Per IBC 2018 2308.4.2.3, how must sawn floor joists be supported laterally at ends and at each support unless they are nailed to a header, band, or rim joist or to an adjoining stud?

• AWith metal strapping on the bottom edge only
• BWith solid blocking not less than 2 inches thick and the full depth of the joist
• CWith a single 1x3 row of bridging at midspan only
• DNo lateral support is required for 2x10s and larger