Nevada B-7 Residential Remodeling Contractor Examination

When splicing a double top plate on a wood-framed remodel wall under IRC 2018, what is the minimum lap (offset) required between end joints in the two plate members?

• A12 inches
• B16 inches
• C24 inches
• D48 inches

A plumber wants to notch the top of a solid-sawn 2x10 floor joist to run a drain. Under IRC 2018 R502.8.1, where is that notch prohibited?

• AIn the middle one-third of the span
• BAnywhere within 12 inches of a bearing
• CIn the outer one-third of the span only
• DOnly at the exact midspan point

A 2x10 solid-sawn floor joist measures 9-1/4 inches deep. What is the largest hole diameter IRC 2018 R502.8.1 allows, and how far must the hole stay from the top or bottom edge?

• A3 inches diameter, 2 inches from either edge
• B2 inches diameter, 1 inch from either edge
• C4-5/8 inches diameter, 2 inches from either edge
• D1-1/2 inches diameter, 3 inches from either edge

What is the minimum bearing length IRC 2018 requires where a floor joist bears on a wood plate or on masonry?

• A1-1/2 inches on wood or metal and 3 inches on masonry or concrete
• B3/4 inch on wood and 1-1/2 inches on masonry
• C3 inches on wood and 4 inches on masonry
• DThe full width of the joist on any support

A 2x4 bearing-wall stud is 3-1/2 inches deep. What is the deepest notch IRC 2018 R602.6 allows in that stud?

• A7/8 inch (25 percent of the stud depth)
• B1-3/8 inches (40 percent of the stud depth)
• C1-3/4 inches (50 percent of the stud depth)
• D2-1/8 inches (60 percent of the stud depth)

An electrician bores a 1-3/4-inch hole through a single 2x4 (3-1/2-inch) stud in an exterior bearing wall. The hole edge is 7/8 inch from the stud edge and is not in a notched section. What does IRC 2018 R602.6 require?

• AThe stud must be doubled, and not more than two successive doubled studs may be bored ove…
• BNothing further — any hole up to 60 percent of the stud is always allowed in a single stud
• CA 16-gage steel stud shoe is mandatory on every bored bearing stud
• DThe hole must be filled with epoxy before the wall is closed

A plumber notches more than half the width of a load-bearing double top plate for a drain. The wall is not sheathed with wood structural panels on the notched side. What repair does IRC 2018 R602.6.1 require?

• AInstall a 16-gage by 1-1/2-inch galvanized metal tie extending at least 6 inches past eac…
• BSister a second 2x4 flat across the notch with two 8d nails
• CFill the notch with construction adhesive and a wood plug
• DAdd blocking between the nearest two studs and continue

In a crawl space, when must solid-sawn floor joists be naturally durable or preservative-treated under IRC 2018 R317.1?

• AWhen they are closer than 18 inches to exposed ground
• BWhen they are closer than 12 inches to exposed ground
• CWhen they are closer than 8 inches to exposed ground
• DOnly when they actually touch the soil

After a field cut on preservative-treated sill plate, what does IRC 2018 R317.1.1 require?

• ATreat field-cut ends, notches, and drilled holes in accordance with AWPA M4
• BPaint the cut with interior latex to seal the end grain
• CNo further treatment is required once the piece left the treating plant
• DWrap the cut end in polyethylene and tape it

During a kitchen remodel a plumber wants to cut a hole through an I-joist web for a 3-inch drain. What does IRC 2018 R502.8.2 allow?

• ANo cuts, notches, or holes except where the manufacturer permits them or a registered des…
• BAny hole that stays 2 inches from the flanges, same as sawn lumber
• CHoles up to one-third of the I-joist depth anywhere in the web
• DA hole of any size if it is filled with expanding foam

Where must rafter ties be located to resist the outward thrust of a pair of rafters under IRC 2018?

• AIn the lower one-third of the attic space, typically at the top plates
• BIn the upper one-third of the rafter length, like collar ties
• COnly at midspan, nailed to the ridge board
• DAnywhere along the rafter as long as 2x4s are used

A 2x8 rafter is 7-1/4 inches deep. What is the maximum depth of the birdsmouth (end) notch IRC 2018 R802.7.1 allows at the plate?

• A3/4 inch
• BAbout 1-3/16 inches (one-sixth of the depth)
• CAbout 1-13/16 inches (one-fourth of the depth)
• DAbout 2-3/8 inches (one-third of the depth)

Per IRC 2018 Table R602.3(1), what is the standard nail spacing for 7/16-inch wood structural panel wall or roof sheathing to framing?

• A6 inches on edges and 12 inches at intermediate supports
• B4 inches on edges and 8 inches in the field
• C8 inches on edges and 16 inches in the field
• D12 inches on edges and 24 inches in the field

A new 5-foot opening is cut in an existing interior bearing wall for a kitchen pass-through. Besides a properly sized header, which pair of studs must frame each side of the opening?

• AA full-height king stud and a jack (trimmer) stud under each end of the header
• BTwo cripple studs only, with no full-height studs
• CA single sole-plate block and a ceiling nailer
• DTwo flat 2x4 fire blocks stacked at mid-height

When replacing subfloor with wood structural panels 3/4 inch thick or less, what nail spacing does IRC 2018 Table R602.3(1) list at edges and intermediate joists?

• A6 inches at edges and 12 inches at intermediate supports
• B4 inches at edges and 8 inches in the field
• C8 inches at edges and 16 inches in the field
• D12 inches at edges and 12 inches in the field

A remodel stair must connect floors that are 105 inches apart. Using the IRC 2018 maximum riser of 7-3/4 inches, what is the smallest number of risers that complies, and what is the resulting unit rise?

• A14 risers at 7.50 inches each
• B13 risers at 8.08 inches each
• C15 risers at 7.00 inches each
• D12 risers at 8.75 inches each

What handrail height does IRC 2018 R311.7.8.1 require, measured vertically from the sloped plane adjoining the tread nosing?

• A34 to 38 inches
• B30 to 34 inches
• C36 to 42 inches
• D42 inches plus or minus 3 inches

An interior landing is 36 inches above the floor below. Under IRC 2018 R312, what guard is required at the open side?

• AA guard at least 36 inches high with openings that will not pass a 4-inch sphere
• BNo guard is required until the drop exceeds 48 inches
• CA guard at least 42 inches high with 6-inch openings
• DA handrail only, 34 to 38 inches high

A new partition is built on a concrete slab-on-grade that is in direct contact with the ground. How must the wood sole plate be protected under IRC 2018 R317.1?

• AUse naturally durable or preservative-treated wood, or separate the plate from the slab w…
• BAny kiln-dried SPF plate is acceptable if it is caulked
• CCoat the plate with drywall compound before standing the wall
• DElevate the plate on cardboard shims

Per IRC 2018 Table R602.3(1), which end-nail schedule is accepted for fastening a stud to a top or bottom plate?

• ATwo 16d common nails (3-1/2 × 0.162 inch)
• BOne 8d box nail
• CSix 6d finish nails
• DA single 3-inch drywall screw

In a window opening, which studs run from the rough sill down to the sole plate?

• AKing studs
• BJack (trimmer) studs
• CCripple studs
• DHeader studs

What are the actual dressed dimensions of a nominal 2x4 used for wall studs?

• A1-1/2 inches by 3-1/2 inches
• B2 inches by 4 inches
• C1-3/4 inches by 3-3/4 inches
• D1-1/4 inches by 3-1/4 inches

A bearing-wall header is built from three 2x12s, each 10 feet long. How many board feet of lumber are in the header, ignoring the plywood spacer?

• A20 board feet
• B40 board feet
• C60 board feet
• D80 board feet

A B-7 crew opens a 6-foot pass-through in an existing interior bearing wall. Which approach satisfies IRC 2018 wall-framing rules?

• AInstall a header sized from Table R602.7(1) or R602.7(2) on jack studs with king studs, a…
• BCut the studs, leave the top plate continuous, and cover the opening with drywall returns
• CDouble the sole plate under the opening and omit the header because the wall is interior
• DHang the cut studs from the ceiling joists with straps and skip a header

Under IRC 2018 R703.2, what must be installed over studs or sheathing of an exterior framed wall before most claddings?

• AOne layer of No. 15 asphalt felt or another approved water-resistive barrier
• BA layer of 6-mil polyethylene on the outside of the sheathing
• CTwo layers of 30-pound felt in every climate zone
• DNo membrane if painted OSB is used

What is the default minimum net free ventilating area for a vented attic under IRC 2018 R806.2?

• A1 square foot of net free area per 150 square feet of attic floor
• B1 square foot of net free area per 50 square feet of attic floor
• C1 square foot of net free area per 300 square feet of attic floor, with no other conditio…
• D1 square foot of net free area per 500 square feet of attic floor

A Las Vegas (Climate Zone 3B) remodel uses the IRC 2018 R806.2 1/300 attic-ventilation exception. Which condition must still be met?

• AA Class I vapor retarder on the ceiling, because every climate zone requires it for 1/300
• BRidge vents only, with soffits sealed
• CPower attic fans equal to 1 cfm per square foot of attic
• DAt least 40 percent and not more than 50 percent of the required vent area located not mo…

A vented attic has 1,800 square feet of floor area. Using the IRC 2018 R806.2 default 1/150 ratio, how much net free ventilating area is required?

• A6 square feet (864 square inches)
• B9 square feet (1,296 square inches)
• C12 square feet (1,728 square inches)
• D18 square feet (2,592 square inches)

Where an ice barrier is required by IRC 2018 R905.1.2, how far up the roof must it extend?

• ATo the fascia only
• B24 inches up the slope from the drip edge, measured along the roof
• CTo a point not less than 24 inches inside the exterior wall line of the building
• DTo the ridge on every roof

A reroof on an existing dwelling has a slope of 3:12. What asphalt-shingle underlayment rule applies under IRC 2018 R905.2.2?

• AAsphalt shingles are prohibited below 4:12
• BOnly torch-applied modified bitumen may be used below 4:12
• CA single layer of 15-pound felt is enough at any slope above 2:12
• DAsphalt shingles are allowed, and double underlayment is required between 2:12 and 4:12

IRC 2018 R905.2.8.5 requires a drip edge on asphalt-shingle roofs in which locations?

• AEaves only
• BRakes only
• CEaves and rake edges
• DValleys only

At a roof-to-sidewall intersection on a remodel, what flashing detail directs water into the gutter and away from the wall cladding?

• AA ridge vent continuation down the wall
• BHousewrap turned onto the shingles
• CA single bead of roofing cement on the siding
• DA kick-out flashing at the low end of the roof-wall intersection

A three-coat stucco remodel wall meets both bare soil and a concrete walk. Where must the weep screed sit under IRC 2018 R703.7.2.1?

• AFlush with grade at both locations
• BTwo inches above the earth and 4 inches above paved areas
• CNot less than 8 inches above the earth and 6 inches above paved areas
• DNot less than 4 inches above the earth and 2 inches above paved areas

A ceiling is reinsulated in a Las Vegas dwelling (Climate Zone 3). What minimum wood-frame ceiling R-value does IRC 2018 Table N1102.1.2 list?

• AR-19
• BR-30
• CR-38
• DR-49

When flashing a replacement flanged window in a WRB-clad wall, which sequence correctly shingles the membranes so water drains out?

• AHead flashing first, then jambs, then the sill pan
• BHousewrap cut flush to the rough opening with no sill pan
• CJamb flashing first, then a bead of caulk as the sill
• DSill pan or sill flashing first, then the window, then jamb flashing lapping the flanges,…

Kraft-faced fiberglass batts are installed in a ceiling below a vented attic. Which way should the kraft facing be oriented?

• AToward the attic (cold side) to stop wind washing
• BFacing must be stripped off in every climate zone
• CEither way; kraft facing is only a handling convenience
• DToward the conditioned room (warm-in-winter side) so it can serve as a Class II vapor ret…

A homeowner wants an unvented (cathedral) attic created during a remodel. What is a core IRC 2018 R806.5 requirement for that assembly?

• ARidge vents without soffit vents
• BA 1/150 vent ratio calculated on the sloped roof area
• CAny combination of batts in the ceiling joists and no roof-deck insulation
• DAir-impermeable insulation against the roof deck, or air-permeable insulation with a code…

What is the IRC 2018 R408.1 default net ventilation area for a crawl space (under-floor space) that is not a basement?

• A1 square foot of vent area per 150 square feet of under-floor area
• B1 square foot of vent area per 1,500 square feet of under-floor area
• CNo vents if the crawl space has a dirt floor
• DOne 4-inch hole in each foundation wall, regardless of area

A second-story sleeping room is remodeled. What net-clear emergency-escape dimensions does IRC 2018 R310.2 require for the window?

• A5.7 square feet net clear area, 24 inches minimum height, 20 inches minimum width, sill n…
• B5.0 square feet net clear area, 20 inches height, 24 inches width, sill not more than 48…
• C4.0 square feet net clear area, 18 inches height, 18 inches width, any sill height
• D9.0 square feet net clear area, 36 inches height, 36 inches width, sill not more than 36…

A basement bedroom window sits at grade. What net-clear opening area does the IRC 2018 R310.2.1 exception allow?

• A3.3 square feet
• B9.0 square feet
• C5.7 square feet, with no exception
• D5.0 square feet

A second-floor bedroom replacement window opens to 20 inches wide by 36 inches high net clear, with a 42-inch sill. Does it meet IRC 2018 R310.2?

• AYes — it meets the 20-inch width, 24-inch height, and 44-inch sill limits
• BNo — the sill must be 36 inches or lower
• CYes — any opening over 4 square feet is accepted in a remodel
• DNo — the net clear area is only 5.0 square feet, which is less than 5.7 square feet requi…

A below-grade egress window well is 48 inches deep. Which IRC 2018 R310.2.3 combination is required?

• AA well of any size if a rope is provided
• BA well only if the window is a casement
• CA 24-inch by 24-inch well with no ladder
• DNot less than 9 square feet of horizontal area, not less than 36 inches in width and proj…

What are the minimum clear opening size and type for the required dwelling egress door under IRC 2018 R311.2?

• AA sliding door with 28 inches of clear width and 76 inches of height
• BA pair of 24-inch doors that together equal 48 inches
• CAny exterior door that is 2 feet 8 inches nominal
• DA side-hinged door with 32 inches of clear width (door at 90 degrees) and 78 inches of cl…

A sidelight is installed 18 inches from a swinging door. The bottom of the glass is 12 inches above the floor. When is that glazing a hazardous location under IRC 2018 R308.4.2?

• ANever, because it is not in the door itself
• BOnly if the door is the required egress door
• COnly if the pane is larger than 15 square feet
• DIt is a hazardous location because it is within 24 inches of the door and the bottom edge…

A window in a shower wall has its bottom edge 48 inches above the shower floor. What glazing does IRC 2018 R308.4.5 require?

• AOrdinary annealed glass is allowed because the sill is above 36 inches
• BNo glass is permitted in a shower wall
• CWire glass only
• DSafety glazing, because the bottom edge is less than 60 inches above the standing surface…