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