NCCER Electricity Module 3 Study Guide Questions and Answers | Latest Version | 2024/2025 | Correct & Verified

NCCER Electricity Module 3 Study Guide Questions and Answers | Latest Version | 2024/2025 | Correct & Verified What is the purpose of an electrical panel? To distribute electrical power throughout a building and protect circuits with breakers. Why should you use insulated tools when working with electricity? To prevent electric shock and ensure safety while handling live wires. What does a circuit breaker do when it trips? It stops the flow of electricity to a circuit to prevent damage from overloads or short circuits. What is the role of a fuse in an electrical circuit? To protect the circuit by blowing when the current exceeds a safe level. How do you test a wire with a multimeter? Set the multimeter to the correct setting and check the continuity or voltage across the wire. 2 What should you check before installing a new circuit? Ensure the circuit is designed to handle the load, and confirm the breaker size and wire gauge are correct. What is the primary function of an electrical meter? To measure electrical quantities like voltage, current, and resistance. Why is it important to size the wire properly for a circuit? Proper wire size ensures the wire can safely carry the expected electrical current without overheating. How does an electrical transformer work? It changes the voltage of electricity, stepping it up or down as needed for distribution or use. What safety precautions should be taken when working with electrical systems? Always turn off power, use insulated tools, and wear proper protective gear. What is the purpose of a junction box? 3 To house and protect electrical connections, ensuring safety and preventing fires. How can you prevent an overload in a circuit? By correctly sizing the circuit breaker and wiring, and ensuring the load does not exceed the circuit’s capacity. What is the difference between alternating current (AC) and direct current (DC)? AC reverses direction periodically, while DC flows in a single direction. What is the role of a switch in a circuit? A switch opens or closes a circuit to control the flow of electricity. Why should you never bypass a circuit breaker? Bypassing a breaker removes protection, increasing the risk of fire or electrical shock. What is the purpose of an electric meter in a home? To measure the amount of electrical energy consumed for billing purposes.