NCCER Interior Finishing & Drywall 3

Question 1

When repairing a small hole less than 1 inch in diameter in drywall, what is the most appropriate repair method?

Accepted Answer

Fill and smooth directly with spackle or lightweight joint compound

Answer

Cut out a large section and install a full patch panel

Answer

Apply fiberglass mesh tape over the hole before compounding

Answer

Install a California patch with wood backing boards

Question 2

What is a 'California patch' (also called a patch without backing) used for in drywall repair?

Accepted Answer

Patching medium-sized holes using the drywall face paper as self-backing

Answer

Repairing hairline cracks less than 1/8 inch wide

Answer

Applying skip-trowel texture to match existing wall patterns

Answer

Sealing water-damaged drywall sections before repainting

Question 3

According to the NEC, what is the maximum allowable gap between an electrical box and the surrounding drywall edge?

Accepted Answer

1/8 inch

Answer

1/4 inch

Answer

1/2 inch

Answer

3/4 inch

Question 4

What type of primer should be applied to new drywall before the finish paint coat?

Accepted Answer

PVA drywall primer-sealer

Answer

Oil-based primer

Answer

Alkyd primer

Answer

Shellac-based primer

Question 5

When using setting-type joint compound (hot mud), what do the numbers on the bag (such as 20, 45, or 90) indicate?

Accepted Answer

The approximate working time in minutes before the compound sets

Answer

The compressive strength rating in PSI

Answer

The recommended coat thickness in thousandths of an inch

Answer

The temperature in degrees Fahrenheit at which it should be applied

Question 6

Which fastener is preferred over nails when attaching drywall to wood framing?

Accepted Answer

Drywall screws

Answer

Common nails

Answer

Roofing nails

Answer

Staples

Question 7

What is the term for the slight indentation created around a drywall screw head when it is driven slightly below the surface?

Accepted Answer

Dimple

Answer

Countersink

Answer

Recess

Answer

Inset