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
In masonry, what is the primary function of mortar?
Answer: To bond masonry units together and distribute loads evenly
Mortar bonds individual masonry units (bricks, blocks, stone) and helps distribute structural loads uniformly across the wall.
What is the purpose of a vapor barrier in wall or floor construction?
Answer: To prevent moisture from passing through and causing condensation or damage
A vapor barrier (or retarder) is a material that limits moisture migration through walls, floors, or ceilings to prevent mold and structural damage.
What does GFCI stand for in electrical construction?
Answer: Ground Fault Circuit Interrupter
A Ground Fault Circuit Interrupter (GFCI) detects current leakage to ground and rapidly shuts off power to prevent electric shock.
Which type of lumber grade is typically used for structural framing in US residential construction?
Answer: Select Structural or No. 2
Select Structural and No. 2 grades meet strength requirements for load-bearing framing members in residential construction per building codes.
What is the purpose of a conduit in electrical installations?
Answer: To protect electrical wires from physical damage
Electrical conduit is a tube or channel that encloses and protects wiring from physical damage, moisture, and corrosion.
What is the main safety concern when working in a trench deeper than 5 feet?
Answer: Cave-in and soil collapse hazards
OSHA requires protective systems such as shoring, sloping, or trench boxes for excavations 5 feet or deeper due to the risk of sudden soil collapse.