E1 RESIDENTIAL ELECTRICAL EXAMINATION 2025/2026
QUESTIONS WITH ANSWERS TAGGED A+
✔✔19/32 inch thick wood structural panels used as subfloor sheathing shall be fastened
to floor framing using ___ common nails and shall be spaced not more than ___ inches
on center at edge support and not more than ___ inches on center for intermediate
supports. - ✔✔8d , 6 , 12
✔✔The ends of floor joists bearing on masonry, concrete, or joist hangers shall not
have less than ___ inches bearing. - ✔✔3
✔✔What is the maximum allowable span of a 2 x 10 Douglas fir-larch #2 floor joist
spaced 24 inches on center supporting a living room and a dead load of 20 psf? - ✔✔11
feet, 8 inches
✔✔correct or incorrect. A vapor retarder is required to be placed between the concrete
floor slab and the base course of a garage structure. - ✔✔incorrect
✔✔Draftstops shall be installed to divide concealed spaces equally above combustible
ceiling assemblies containing usable space so that the concealed space does not
exceed an area of _____ square feet. - ✔✔1000
✔✔A garage floor concrete slab shall have a minimum compressive strength of
_______ where weathering potential is negligible. - ✔✔2,500 psi
✔✔Correct or incorrect. Holes drilled in preservative-treated wood shall be treated on
site in conformance with AWPA M4. - ✔✔correct
✔✔Insulation materials within wall assemblies shall have a flame spread index not
greater than ___ and a smoke- developed index not greater than ___. Tests conducted
shall conform with ASTM E 84 or UL ___. - ✔✔25, 450, 723
✔✔Glazing located in a wall facing a shower enclosure is considered to be in a
hazardous location when the bottom exposed edge of the glazing is less than ___
inches above the standing surface. - ✔✔60
✔✔Smoke alarms shall NOT be installed within a horizontal distance of ___ inches from
the tip of a ceiling fan blade. - ✔✔36
✔✔Guardrails for balconies located more than 30 inches vertically above grade are
required to be not less than ____ inches in height. - ✔✔42
, ✔✔Emergency escape and rescue openings shall be provided with a minimum clear
opening height of _____ inches and minimum clear opening width of _____ inches. -
✔✔24 , 20
✔✔A flight of stairs shall be allowed to have a maximum variation of ____ inch between
the greatest riser height and the smallest riser height. - ✔✔3/8
✔✔When ramps are required to have handrails, the height of the handrail shall not be
less than ____ inches and not more than ____ inches measured above the finished
surface of the ramps slope. - ✔✔34 , 38
✔✔Roof eave projections shall be limited to ____ inches for detached garages located
within 2 feet from the lot line. - ✔✔4
✔✔Through penetration firestop systems for wall or floor-ceiling assemblies shall be
tested in accordance with ASTM E 814 or _____. - ✔✔UL 1479
✔✔Townhouses separated by a common wall shall have the wall assembly provide a
minimum fire-resistance rating of not less than ______, when equipped with a fire
sprinkler system. - ✔✔1 hour
✔✔Fiber-reinforced gypsum board installed as above-deck roof thermal insulation shall
comply with which of the following standards? - ✔✔ASTM C 1278
✔✔A roof recover over an existing roof shall NOT be permitted where the existing roof
covering is of which of the following materials? - ✔✔" all of these ! Cement ! Clay! Slate
✔✔Attic access for buildings with combustible roof construction shall have the rough-
framed opening be not less than _____ inches by _____ inches. - ✔✔22 , 30
✔✔What is the minimum required footing thickness for masonry fireplaces and their
chimneys? - ✔✔12 inches
✔✔When the underside of wood structural panel roof sheathing is exposed to the
outdoors, it shall be identified as ______. - ✔✔Exposure 1
✔✔Which of the following information is NOT required to be placed on a certificate of
occupancy? - ✔✔The square footage of the structure
✔✔One Family Dwellings and Two Family Dwellings that have separate means of
egressing and are no more than ____ stories in height above the grade plane are
QUESTIONS WITH ANSWERS TAGGED A+
✔✔19/32 inch thick wood structural panels used as subfloor sheathing shall be fastened
to floor framing using ___ common nails and shall be spaced not more than ___ inches
on center at edge support and not more than ___ inches on center for intermediate
supports. - ✔✔8d , 6 , 12
✔✔The ends of floor joists bearing on masonry, concrete, or joist hangers shall not
have less than ___ inches bearing. - ✔✔3
✔✔What is the maximum allowable span of a 2 x 10 Douglas fir-larch #2 floor joist
spaced 24 inches on center supporting a living room and a dead load of 20 psf? - ✔✔11
feet, 8 inches
✔✔correct or incorrect. A vapor retarder is required to be placed between the concrete
floor slab and the base course of a garage structure. - ✔✔incorrect
✔✔Draftstops shall be installed to divide concealed spaces equally above combustible
ceiling assemblies containing usable space so that the concealed space does not
exceed an area of _____ square feet. - ✔✔1000
✔✔A garage floor concrete slab shall have a minimum compressive strength of
_______ where weathering potential is negligible. - ✔✔2,500 psi
✔✔Correct or incorrect. Holes drilled in preservative-treated wood shall be treated on
site in conformance with AWPA M4. - ✔✔correct
✔✔Insulation materials within wall assemblies shall have a flame spread index not
greater than ___ and a smoke- developed index not greater than ___. Tests conducted
shall conform with ASTM E 84 or UL ___. - ✔✔25, 450, 723
✔✔Glazing located in a wall facing a shower enclosure is considered to be in a
hazardous location when the bottom exposed edge of the glazing is less than ___
inches above the standing surface. - ✔✔60
✔✔Smoke alarms shall NOT be installed within a horizontal distance of ___ inches from
the tip of a ceiling fan blade. - ✔✔36
✔✔Guardrails for balconies located more than 30 inches vertically above grade are
required to be not less than ____ inches in height. - ✔✔42
, ✔✔Emergency escape and rescue openings shall be provided with a minimum clear
opening height of _____ inches and minimum clear opening width of _____ inches. -
✔✔24 , 20
✔✔A flight of stairs shall be allowed to have a maximum variation of ____ inch between
the greatest riser height and the smallest riser height. - ✔✔3/8
✔✔When ramps are required to have handrails, the height of the handrail shall not be
less than ____ inches and not more than ____ inches measured above the finished
surface of the ramps slope. - ✔✔34 , 38
✔✔Roof eave projections shall be limited to ____ inches for detached garages located
within 2 feet from the lot line. - ✔✔4
✔✔Through penetration firestop systems for wall or floor-ceiling assemblies shall be
tested in accordance with ASTM E 814 or _____. - ✔✔UL 1479
✔✔Townhouses separated by a common wall shall have the wall assembly provide a
minimum fire-resistance rating of not less than ______, when equipped with a fire
sprinkler system. - ✔✔1 hour
✔✔Fiber-reinforced gypsum board installed as above-deck roof thermal insulation shall
comply with which of the following standards? - ✔✔ASTM C 1278
✔✔A roof recover over an existing roof shall NOT be permitted where the existing roof
covering is of which of the following materials? - ✔✔" all of these ! Cement ! Clay! Slate
✔✔Attic access for buildings with combustible roof construction shall have the rough-
framed opening be not less than _____ inches by _____ inches. - ✔✔22 , 30
✔✔What is the minimum required footing thickness for masonry fireplaces and their
chimneys? - ✔✔12 inches
✔✔When the underside of wood structural panel roof sheathing is exposed to the
outdoors, it shall be identified as ______. - ✔✔Exposure 1
✔✔Which of the following information is NOT required to be placed on a certificate of
occupancy? - ✔✔The square footage of the structure
✔✔One Family Dwellings and Two Family Dwellings that have separate means of
egressing and are no more than ____ stories in height above the grade plane are
