NCCER Interior Finishing & Drywall

Question 1

What is the standard thickness of drywall used for interior walls in residential construction?

Accepted Answer

1/2 inch

Answer

1/4 inch

Answer

3/8 inch

Answer

5/8 inch

Question 2

When installing drywall on ceilings, what is the maximum recommended screw spacing in the field?

Accepted Answer

12 inches

Answer

6 inches

Answer

8 inches

Answer

16 inches

Question 3

What type of drywall is specifically designed for use in high-moisture areas such as bathrooms?

Accepted Answer

Moisture-resistant drywall (green board)

Answer

Standard white-board drywall

Answer

Type X fire-rated drywall

Answer

Soundproofing drywall

Question 4

What is the primary purpose of Type X (fire-rated) drywall?

Accepted Answer

To provide fire resistance in walls and ceilings

Answer

To improve sound transmission class ratings between rooms

Answer

To add moisture resistance in kitchens

Answer

To increase impact resistance in high-traffic hallways

Question 5

What is the correct technique for cutting drywall with a utility knife?

Accepted Answer

Score the face paper, snap the panel, then cut the back paper

Answer

Cut completely through both paper faces in one pass

Answer

Use tin snips along a scored line

Answer

Wet the panel to soften the gypsum before cutting

Question 6

What is the standard stud spacing used for most interior drywall installations?

Accepted Answer

16 inches on center

Answer

12 inches on center

Answer

20 inches on center

Answer

24 inches on center

Question 7

Which orientation should drywall sheets be hung on walls for maximum structural strength?

Accepted Answer

Horizontally, with the long edge perpendicular to studs

Answer

Vertically, with seams parallel to studs

Answer

Diagonally at 45 degrees to the studs

Answer

Either orientation provides equal strength