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

NCCER Electrical Module 2 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified Why should you always turn off the power before working on electrical circuits? Turning off the power helps prevent electric shock and reduces the risk of electrical fires. What is the function of a circuit breaker? A circuit breaker protects the electrical circuit by automatically shutting off the power in case of overload or short circuit. What type of protective equipment should be worn when working with electricity? Wear rubber gloves, insulated tools, and safety goggles to protect against electric shock and sparks. How should electrical cords be maintained on a job site? Electrical cords should be inspected for damage, kept away from moisture, and stored properly to prevent wear and tear. 2 What does the term "conductor" refer to in electrical systems? A conductor is a material that allows the flow of electric current, typically a wire made of copper or aluminum. What is the purpose of a fuse in an electrical circuit? A fuse protects the circuit by breaking the connection when the current exceeds a safe level, preventing damage or fire. Why is it important to use the correct wire size for electrical circuits? Using the correct wire size ensures the wire can safely carry the electrical load without overheating or causing a fire. What is the difference between AC and DC electricity? AC (alternating current) changes direction periodically, while DC (direct current) flows in one direction only. What should you do if you find an exposed electrical wire on the job site? Report it immediately, and avoid touching it. Ensure it is properly insulated or de-energized before working near it. 3 What is the function of a grounding rod in an electrical system? A grounding rod connects the electrical system to the earth, ensuring that electricity flows safely in case of a fault. What is the purpose of an electrical panel? An electrical panel distributes electrical power to various circuits and houses circuit breakers or fuses to protect the system. What are the risks associated with working near energized electrical equipment? The risks include electric shock, burns, and potential fires. Always ensure equipment is de- energized before working on it. Why should electrical equipment be kept dry? Water or moisture can cause short circuits, corrosion, and increase the risk of electrical shock. What is the first step before performing electrical work on a circuit? Always turn off the power and verify that the circuit is de-energized using a voltage tester. 4 What does a GFCI (Ground Fault Circuit Interrupter) do? A GFCI detects differences between the hot and neutral wires, quickly shutting off the power to prevent electric shock. What are some common electrical hazards on construction