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24 questions from the general building trade knowledge practice test.
10 questions, graded as you go, with the reason for every answer. No sign-up.
A straight wall 24 ft long is framed with studs at 16 in. on centre. Counting one stud at each end and no extras for corners or openings, how many studs are needed?
Answer in studs.
19 studs
Spaces = (24 x 12) / 16 = 288 / 16 = 18. Studs = spaces + 1 = 19.
Reference: Wood framing takeoff: studs
In a framed wall opening, which members carry the ends of the header down to the bottom plate?
C. Jack (trimmer) studs
The header bears on the jack studs, which are cut to fit under it. King studs run full height beside the jacks and are nailed to the header ends, but the header does not sit on them.
Reference: Wood wall framing: rough openings
Why is a preservative-treated plate used where wood framing sits on a concrete foundation?
B. Concrete can pass moisture that would rot untreated wood
Concrete and masonry in contact with the ground wick moisture, so wood resting on them must be treated or naturally durable to resist decay. Treatment does not make the plate stronger.
Reference: Wood framing: protection against decay