Construction and Building Trades Flashcards
6 cards from real NOCTI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Construction and Building Trades flashcards as text
What is the standard height of a residential interior door in the United States?
Answer: 6 feet 8 inches
The standard US residential interior door height is 6 feet 8 inches (80 inches), though taller doors are available.
In carpentry, what is the purpose of a stud finder?
Answer: To detect wood framing members behind drywall
A stud finder detects the wood or metal framing studs hidden behind drywall so fasteners can be anchored securely.
What is the minimum slope (pitch) recommended for a residential roof to ensure proper water drainage?
Answer: 2:12
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.
Which tool is used to ensure a surface is perfectly horizontal during construction?
Answer: Spirit level
A spirit (bubble) level uses a liquid-filled vial to indicate when a surface is perfectly horizontal (level) or vertical (plumb).
What does the term 'on center' (OC) refer to in framing?
Answer: The distance measured from the center of one stud to the center of the next
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.
What is the function of a P-trap in a plumbing system?
Answer: To hold a small amount of water that blocks sewer gases from entering the building
The curved P-trap retains water to create a seal that prevents foul sewer gases from rising into occupied spaces through drain openings.