Questions and answers
What is recommended to repair polyurethane foam roofing? ✔✔Elastomeric caulking
The outlet of a laundry tray should be no farther than _____ inches horizontally from the
standpipe trap. ✔✔30
The horizontal distance from the fixture outlet to the trap weir should not be greater than
_______ inches measured from the centerline of the fixture outlet to the centerline of
the inlet of the trap. ✔✔30Air-admittance valves are __________ to vent fixtures
installed at island structures in kitchens. ✔✔Permitted
The door between an attached garage and a dwelling unit should be of solid wood not
less than ________ inches thick. ✔✔1 3/8
If particleboard panels used as wall sheathing are applied in a horizontal pattern across
the wall, the end joints should be offset so that four panel corners ________. ✔✔do not
meet
The size of a P-trap drainpipe should be at least _______ inches. ✔✔1.5
Notches in solid lumber joists, rafters and beams should not be longer than
____________ the depth of the member. ✔✔1/3
A minimum service of _____ amps is required for a single residential dwelling unit.
✔✔100
If the service or feeder rating in amps is 200, then the aluminum AWG size should be
_______. ✔✔4/0
T/F: In homes located in areas having a history of ice forming along the eaves, an ice
barrier consisting of at least three layers of underlayment cemented together is
required. ✔✔True
There should be at least ____-inch gypsum board applied on the garage side to
separate the garage from the residence and its attic space. ✔✔1/2
A window well should have a horizontal area of at least ____ square feet, with a
minimum horizontal projection and width of _____ inches. ✔✔9 and 36
, The opening to an attic space that has any mechanical equipment located in it should
be a minimum of ______ inches by ______ inches. ✔✔30 and 20
If there are appliances in the attic space, an opening at least _____ and a clear,
unobstructed path should be provided. ✔✔22 inches wide and 30 high
Standpipes for clothes washers should extend at least ____ inches and no more than
____ inches above the trap weir. ✔✔18 and 42
T/F: A standpipe can serve as an indirect waste receptor. ✔✔True
An open vent pipe that passes through a roof should extend at least _____ inches
above the roof. ✔✔6
If a roof is used for a purpose other than weather protection, the vent extensions should
extend above the roof by at least ____ feet. ✔✔7
If particleboard is used as wall sheathing, the grade mark with Type _____ or _____
should be stamped on it. ✔✔M-1 and M-2
The purpose of gravel on a built-up tar-and-gravel roof is __________. ✔✔to prevent
delamination of the plys
to protect the membrane from ultraviolet rays
to provide ballast to help hold down the roof membrane
A roof that has a problem with ponding generally still has water on it at least ____ hours
after it has rained. ✔✔48
The purpose of a cant strip is to __________. ✔✔prevent the roof membrane from
cracking at a change in direction
The roofing material having the shortest life expectancy is __________. ✔✔roll roofing
A retaining wall ___________. ✔✔is used to prevent soil movement
When lowering a basement floor, if the soil is excavated only to the bottom of the
footing, it may result in _____________. ✔✔loss of lateral support for the footing
The minimum end-bearing for beams is _____ inches. ✔✔3-5/8
A load-bearing stud wall has a ____________. ✔✔double top plate and a single sole
plate