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Exam (elaborations)

Electrical Wiring Questions and Answers Graded A+

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  • Electrical Wiring

Electrical Wiring Questions and Answers Graded A+ What is the role of a relay in electrical circuits? A relay acts as an electrically operated switch, allowing a low-power signal to control a higher power circuit. How does the polarity of wires affect electrical devices? Correct polarit...

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  • October 24, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Electrical Wiring
  • Electrical Wiring
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BrilliantScores
Electrical Wiring Questions and Answers
Graded A+

What is the role of a relay in electrical circuits?


✔✔A relay acts as an electrically operated switch, allowing a low-power signal to control a

higher power circuit.




How does the polarity of wires affect electrical devices?


✔✔Correct polarity ensures that devices function properly; reversing the polarity can cause

malfunction or damage.




What are the common colors used to identify wires in residential wiring?


✔✔Common wire colors include black or red for hot wires, white for neutral, and green or bare

for ground.




How do you ensure a circuit is de-energized before working on it?


✔✔To ensure a circuit is de-energized, use a multimeter to check for voltage and verify that the

circuit breaker is turned off.




1

, What is the significance of voltage drop in electrical circuits?


✔✔Voltage drop refers to the reduction in voltage as electrical current travels through a wire;

excessive drop can affect the performance of devices.




Why are polarized plugs used in electrical devices?


✔✔Polarized plugs ensure that the hot and neutral wires are connected correctly, reducing the

risk of electric shock.




What factors determine the maximum load a circuit can handle?


✔✔The maximum load is determined by wire gauge, circuit breaker rating, and the type of

circuit (e.g., residential or commercial).




What is the purpose of a ground fault interrupter (GFI)?


✔✔A GFI protects against electrical shock by quickly shutting off power when it detects an

imbalance between incoming and outgoing current.




How can you identify an overloaded circuit?


✔✔Signs of an overloaded circuit include frequent tripping of breakers, flickering lights, and

warm or discolored outlets.

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