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...
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.
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, 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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