Building Systems and Components Flashcards
5 cards from real NHIE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 5 Building Systems and Components flashcards as text
What is the primary purpose of a home's foundation?
Answer: To transfer the load of the structure to the ground
The foundation is the critical structural element that supports the entire weight of a building, including its walls, roof, and contents. Its primary purpose is to safely distribute this immense load evenly across a larger area of soil, preventing the structure from settling unevenly or collapsing. This ensures the stability, integrity, and longevity of the home.
Which of the following indicates a potential safety issue in an electrical panel?
Answer: Double-tapped breakers
Double-tapped breakers occur when two wires are connected to a single breaker terminal designed for only one wire. This creates an unsafe condition because the breaker may not properly trip when overloaded, leading to overheating, potential fire hazards, and non-compliance with electrical codes. It indicates a significant safety defect in the electrical panel that requires immediate attention.
What is the minimum slope required for a horizontal drain pipe to ensure proper flow?
Answer: 1/4 inch per foot
A minimum slope of 1/4 inch per foot is required for horizontal drain pipes to ensure gravity effectively carries wastewater and solids away. This specific gradient prevents standing water, blockages, and the accumulation of debris within the pipes. Proper slope is crucial for the efficient, sanitary, and clog-free operation of a plumbing drainage system.
Which of the following is a sign of potential roof failure?
Answer: Granule loss exposing the asphalt layer
Granule loss on asphalt shingles is a significant indicator of wear and potential roof failure. The granules protect the asphalt layer from damaging UV radiation and physical impact; once exposed, the asphalt deteriorates rapidly, leading to cracking, brittleness, and eventual leaks. This condition signals that the roof's protective capabilities are compromised and replacement may be necessary.
What is the main purpose of the condensate drain in an air conditioning system?
Answer: To remove condensation from the evaporator coil
As warm, humid air passes over the cold evaporator coil in an air conditioning system, moisture condenses on its surface. The condensate drain's main purpose is to collect and safely channel this water away from the system and the building. This prevents water damage, mold growth, and maintains the efficiency and proper operation of the AC unit.