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.
1
, 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.
2
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.
1
, 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.
2
