RBC Sample Questions with correct Answers

A wall on a drawing with a scale of 1/4" =1-foot measures 5 1/2". How long is the wall in feet? - Answer- 22' - (5 1/2= 5 2/4 5X4=20 +2 =22') A line on a drawing is composed of long and short dashes. What is the name of this line? - Answer- A centerline Most construction lumber is cut ____ sawn - Answer- Flat sawn What is the minimum nominal thickness of the ridge board? - Answer- 1 inch How Many jack studs will be required for a 2-2x12 header in an interior bearing wall supporting one floor only, building width of 28', and a span of 7'-0" - Answer- 2 Jack stud required What is the maximum hole that may be cut in a 2X12 nominal floor joist? - Answer- 4" Inches What size strap is required if a top plate is notched more than 50% of its width? - Answer- 16 gage in thickness and 1 1/2" wide The end of a wood joist must bear on a wood beam by at least _____inches? - Answer- 1 1/2 The dimension of fine aggregate in concrete is up to ___ " in diameter and coarse aggregate is larger than_____". - Answer- 1/4 for both Concrete gains most of its strength in how many days? - Answer- 28 days In what section of the span of a floor joist is it NOT permitted to cut a notch? - Answer- Middle third What material is required for the door of an ash dump cleanout? - Answer- Ferrous metal or masonry A cricket is required when the width of a chimney is greater than _____inches. - Answer- 30" In what direction must the access gate of a pool swing? - Answer- Outwards What is the minimum ceiling height over a bathtub? - Answer- 6'-8" What is the maximum unsupported height of a pier consisting of 12"X16" hollow core blocks filled with type S mortar? - Answer- 120" What is the least outside circular diameter of a handrail? - Answer- 1 1/4" Insulation shall have a smoke-developed index not to exceed? - Answer- Not to exceed 450 From where must a smoke alarm draw its primary power? - Answer- building wiring What is the live load of an attic with habitable space? - Answer- 30 # What is the required width and height of the egress door?___X___? - Answer- 32X78 The header is an exterior bearing wall of a building that is 28 feet wide, 50 pound snow load, supports a roof, ceiling and one center bearing floor. If 3-2X12S are used, what is the allowable span? - Answer- 8'-0" How far into concrete must anchor bolts extend? - Answer- 7" What is the maximum height of the backfill for a play masonry foundation wall, 8" high and 8" thick, is constructed in type GW soil? - Answer- 5' If a footing is 18" wide, what is the maximum width of a foundation wall placed on this footing? - Answer- 14" What is the slope allowance for the bottom of a footing___in ____ - Answer- 1 unit in 10 = 10% Slope How far must foundation gravel extend above the footing drain? - Answer- 6" What distance from a wall must be base of a ladder be placed that has a working length of 16'? - Answer- 4' -it is 1/4 the working length What is the term for the basic starting point for the layout of a building? - Answer- benchmark What is required to vent a hip roof? - Answer- soffit and ridge vents What is the overlap in inches of nominal 8" Palin-bevel wood siding board? - Answer- 1 1/4" plain bevel wood siding What is the nailing requirement for a plywood soffit? - Answer- 4D nails spaced 6" apart What is the spacing In inches pf veneer ties? - Answer- 36 inches What is the minimum penetration of a drywall screw into wood ? - Answer- 5/8" What is the minimum width of a stairway? - Answer- 36" What is the most often used hinge for hanging residential doors? - Answer- loose pin butt mortise hinge What size window is required in a bathroom if there is no mechanical ventilation? - Answer- 3 square feet What is the minimum width of a hallway? - Answer- 3' In Virginia, what are the R Value insulation requirements for the ceiling, wall, and floor. - Answer- 49, 20, 19 The under-floor space vents must be covered with material with a least dimension of? - Answer- 1/4" What is the maximum slump of concrete placed in removable forms? - Answer- 6" The end joints of double top plates must be offset at least________? - Answer- 24" What's the required clearance of wood siding from the ground before it is required to be preservative treated ? - Answer- 6" What is required to support brick veneer above openings in exterior walls? - Answer- Lintel What is the minimum stroke width of site address numbers? - Answer- 1/2" What's the predominant background color of a Danger sign? - Answer- RED The setback distance is the minimum distance between a ______ and the _____lines? - Answer- House and the property line Mortar must be used within _____ hours after initial mixing when the air temperature is 80 degrees or higher. - Answer- 2 1/2 hours How is the drip edge applied in ration to the underlayment at the rake? - Answer- Over the underlayment What is the thickness of flashing? - Answer- 0.019" What is the required width of a footing supporting a 30" fireplace? - Answer- 42" Return air may not be taken from which rooms? - Answer- closet, bathroom, toilet room, kitchen, garage, mechanical room, boiler room, furnace room, unconditioned attic or other dwelling unit What is the minimum unobstructed headroom in an attic above access opening? - Answer- 30" Removal of roof covering is required prior to installation of new when there are _____ or more existing applications - Answer- 2 or more If there is a leak where the porch roof meets the house, what component has not been installed correctly? - Answer- flashing What is the side spacing , in inches, between wood shakes? - Answer- 1/2 What is the number of joists used to support parallel bearing partitions? - Answer- doubled Joists What size is required to reinforce a non-conforming web hole in a steel floor joist? - Answer- #8 screws What is the live load of a guardrail infill component? - Answer- 50 lbs Glazing is in a hazardous location if it is adjacent to the the landing at the bottom of a stair and less than 36 inches above the landing and within _____inches horizontally of the Bottom of the tread? - Answer- 60" What is the required height of a guard on porch? - Answer- 36" Handrails adjacent to a wall shall have a space of not less than _____ inches between the wall and handrail - Answer- 1 1/2" Compressible soil shall not be used as ______. - Answer- fill What is the minimum thickness of a spread footing? - Answer- 6" In Virginia, what is the minimum specified compressive strength in psi of concrete in a basement wall exposed to weather? - Answer- 3,000 lbs What is the minimum depth of a footing? - Answer- 12" What is the maximum spacing of screws securing 5/8" thick gypsum board installed on a ceiling oriented perpendicular to the supports 24" on center and adhesive is used? - Answer- 24" What is the maximum span for a No. 2 Southern Pine, 2X10 wood floor joist in a kitchen with a deal load of 20 psf, spaced 16" on center? - Answer- 14'-1" What is the dimension of the air space between masonry veneer and the wall sheathing? - Answer- 1" What temperature triggers the need for eave flashing? - Answer- temperature in January is 25 degrees or less When installing solid wood flooring, what is the minimum distance form the wall that the first strip should be installed? - Answer- 1/2 " What size nail is used to determine the proper distance between the top of an exterior door and the head jamb? - Answer- 4D What is the minimum number of anchor bolts required for a wall section? - Answer- 2