NOCTI Construction and Building Trades 2

Question 1

What is the standard height of a residential interior door in the United States?

Accepted Answer

6 feet 8 inches

Answer

The standard US residential interior door height is 6 feet 8 inches (80 inches), though taller doors are available.

Question 2

In carpentry, what is the purpose of a stud finder?

Accepted Answer

To detect wood framing members behind drywall

Answer

A stud finder detects the wood or metal framing studs hidden behind drywall so fasteners can be anchored securely.

Question 3

What is the minimum slope (pitch) recommended for a residential roof to ensure proper water drainage?

Accepted Answer

2:12

Answer

A minimum 2:12 pitch (2 inches of rise for every 12 inches of run) is generally required for most roofing materials to ensure adequate drainage.

Question 4

Which tool is used to ensure a surface is perfectly horizontal during construction?

Accepted Answer

Spirit level

Answer

A spirit (bubble) level uses a liquid-filled vial to indicate when a surface is perfectly horizontal (level) or vertical (plumb).

Question 5

What does the term 'on center' (OC) refer to in framing?

Accepted Answer

The distance measured from the center of one stud to the center of the next

Answer

On center (OC) spacing is measured from the centerline of one framing member to the centerline of the next, commonly 16" OC or 24" OC.

NOCTI - National Occupational Competency Testing Institute Practice Test