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- 1. Multiple Choice
It consists of a high resistance strip of alloy that melts readily.
Fuse
Circuit breaker
Grounding
Earth wire
- 2. Multiple Choice
Which of the following is not an example of safety device?
fuse
circuit breaker
earth wire
battery
- 3. Multiple Choice
A large switch that is opened automatically by an electromagnet when the current is large.
earth wire
circuit breaker
grounding
RCD's
- 4. Multiple Choice
Is an electrical connection between the appliance and the earth or any conductor with zero potential?
Double insulation
Circuit breaker
Grounding
RCD's
- 5. Multiple Choice
Why are fuses and circuit breakers used in circuits?
Fuses and circuit breakers open to the circuit when a large amount of current flows through the circuit.
Fuses and circuit breakers increase the efficiency of the appliances within the circuit.
Fuses and circuit breakers insulate the connection in the circuit.
Fuses and circuit breakers can help out the electrical consumption.
- 6. Multiple Choice
It has two layers of insulating material that covers the live wires.
Circuit breaker
RCD's
Earthing
Double insulation
- 7. Multiple Choice
A device that quickly breaks an electrical circuit to prevent serious harm from ongoing electric shock.
transformer
RCD's
earth wire
fuse
- 8. Multiple Choice
Which of the following is an example of safety device at home?
copper wire
battery
circuit breaker
bulb
- 9. Multiple Choice
Your fuse at home has “blown” up many times. Which of the following will you do to solve this problem and prevent it from happening again?
Connect appliances in series instead of parallel.
Do not use too many appliances at the same time.
Plug two or three appliances in one outlet.
Connect an additional fuse to your circuit.
- 10. Multiple Choice
Correct
Incorrect
- 11. Multiple Choice
Correct
Incorrect
- 12. Multiple Choice
Correct
Incorrect
- 13. Multiple Choice
Correct
Incorrect
- 14. Multiple Choice
Correct
Incorrect
- 15. Multiple Choice
Correct
Incorrect
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