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NCCER Electrical Level 2 Module 10 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified $10.13
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NCCER Electrical Level 2 Module 10 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified
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NCCER Electrical Level 2 Module 10 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified What is the primary function of a circuit breaker? A circuit breaker is designed to protect an electrical circuit by interrupting the flow of current in case of overload or short circ...

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  • January 4, 2025
  • 12
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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NCCER Electrical Level 2 Module 10
Questions and Answers | Latest Version
| 2024/2025 | Correct & Verified
What is the primary function of a circuit breaker?


✔✔A circuit breaker is designed to protect an electrical circuit by interrupting the flow of

current in case of overload or short circuit, preventing damage to wires and devices.




How does a fuse differ from a circuit breaker?


✔✔A fuse melts and breaks the circuit when current exceeds a safe limit, whereas a circuit

breaker can be reset after tripping, making it reusable.




What causes a circuit breaker to trip?


✔✔A circuit breaker trips when there is an overload of current, a short circuit, or a ground fault,

ensuring the circuit is protected from damage.




Why should circuit breakers be installed according to their rated capacity?


✔✔Installing circuit breakers with the correct rated capacity ensures that the breaker will trip

during overload conditions, preventing overheating and potential fires.




1

, What is the role of a fuse in a circuit?


✔✔A fuse protects the circuit by melting and disconnecting the circuit when the current exceeds

the fuse's rated limit, preventing further damage to the system.




How does a circuit breaker prevent electrical fires?


✔✔By automatically interrupting the circuit when excessive current is detected, preventing

overheating of the wires and reducing the risk of fire.




What are the common types of circuit breakers?


✔✔The most common types of circuit breakers are standard circuit breakers, ground fault circuit

interrupters (GFCIs), and arc fault circuit interrupters (AFCIs).




What is a ground fault circuit interrupter (GFCI) breaker designed to do?


✔✔A GFCI breaker detects differences between the hot and neutral wires, tripping the circuit if

it senses a leakage current to the ground, preventing electric shocks.




What is the purpose of an arc fault circuit interrupter (AFCI)?


✔✔An AFCI breaker detects dangerous arc faults in the circuit and trips to prevent electrical

fires caused by damaged or faulty wiring.

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