Other Skilled Trades Carpentry 3

Question 1

What is the purpose of a vapor barrier in floor framing over a crawl space?

Accepted Answer

To prevent moisture from rising into the floor structure

Answer

A vapor barrier (typically 6-mil poly sheeting) is placed over the crawl space ground to prevent ground moisture from rising and damaging the floor framing.

Question 2

What angle are interior door frames typically shimmed and plumbed to achieve?

Accepted Answer

Perfectly plumb at 90° to the floor

Answer

Door frames must be plumbed perfectly vertical (90° to the floor) so the door swings freely and latches properly without drifting open or closed.

Question 3

In US residential construction, what is the maximum allowable span for a 2x10 floor joist at 16 OC using #2 Douglas Fir?

Accepted Answer

17 feet

Answer

A 2x10 #2 Douglas Fir floor joist at 16 OC can span approximately 17 feet according to standard US span tables.

Question 4

What tool is used to transfer a level line around all four walls of a room?

Accepted Answer

Laser level

Answer

A laser level projects a perfectly level beam around the room, allowing carpenters to mark a continuous reference line on all walls.

Question 5

Which fastener is required when attaching a ledger board to a house rim joist for a deck?

Accepted Answer

Lag screws or through-bolts

Answer

Building codes require ledger boards to be attached with lag screws or through-bolts of appropriate size and spacing to safely transfer deck loads to the house structure.

Other Skilled Trades Practice Test

Other Skilled Trades Practice Test

Other Skilled Trades Carpentry 3