NCCER Electrical Module 2 Review Questions and Answers | Latest Version | 2024/2025 | Correct & Verified

NCCER Electrical Module 2 Review Questions and Answers | Latest Version | 2024/2025 | Correct & Verified What is a short circuit, and what causes it? A short circuit occurs when electricity flows through a path of low resistance, often due to damaged insulation or faulty wiring. How can you reduce the risk of electrical fires? By ensuring circuits are not overloaded, wiring is properly installed, and electrical equipment is well-maintained. Why is it important to never touch electrical equipment with wet hands? Wet hands can increase the conductivity of electricity, significantly raising the risk of electric shock. What should you do if you are unsure about a safety procedure or equipment? Consult a supervisor or safety manual to ensure proper procedures are followed before proceeding. 2 What is the importance of labeling electrical panels and breakers? Proper labeling helps identify circuits quickly, ensuring safety and preventing mistakes during maintenance or emergencies. What is the proper way to store electrical tools when not in use? Store tools in a dry, secure location, away from moisture and damage, to ensure they remain safe to use. How should you handle a situation where a circuit breaker keeps tripping? Investigate the cause of the overload, ensure circuits are not overloaded, and repair any damaged components before resetting the breaker. What is the function of a disconnect switch in electrical systems? A disconnect switch allows you to safely disconnect power from electrical equipment for maintenance or repairs. What is the purpose of the National Electrical Code (NEC)? 3 The NEC provides guidelines and standards for the safe installation of electrical wiring and equipment. What should you do before working on any electrical system? Always de-energize the system and lock out/tag out power sources to prevent electrical shock. What type of personal protective equipment (PPE) is necessary when working with electricity? PPE such as rubber gloves, insulated tools, safety glasses, and flame-resistant clothing should be worn to prevent electrical injuries. Why is grounding important in electrical systems? Grounding provides a safe path for electrical currents to follow in case of faults, reducing the risk of electric shock. What is the difference between a ground fault and a short circuit? A ground fault occurs when electrical current flows through an unintended path to the ground, while a short circuit is a low-resistance path between two conductors. 4 What is the proper way to test an electrical circuit for power? Use a voltage tester or multimeter to verify the presence of electricity in the circuit before working on it. How should electrical tools be inspected before use? Inspect for damage, wear, and proper insulation, ensuring tools are safe to use before starting work. Why is it important to use insulated tools when working with electrical systems? Insulated tools help protect workers from electrical shock by preventing contact with live wires or energized components. What is the function of a circuit breaker?