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MCQ on Circuit Breaker | Online Quiz
25 Questions (Selected Randomly)
25 Marks (1 Mark/Question)
25 Minutes of Time
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- Answered
- Review
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Question 1 of 25
1. Question
What is/are the main disadvantage of using oil as the quenching medium in the circuit breakers?
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Question 2 of 25
2. Question
A thermal protection switch provides protection against …..
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Question 3 of 25
3. Question
….. is used for railway electrification.
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Question 4 of 25
4. Question
….. circuit breaker is preferred to be installed in the extra-high voltage AC system.
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Question 5 of 25
5. Question
Which among these circuit breakers produce the least arc energy?
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Question 6 of 25
6. Question
The rating of the circuit breaker is usually determined on the basis of ….. fault.
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Question 7 of 25
7. Question
Which of the following circuit breaker is highly reliable and has the least maintenance?
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Question 8 of 25
8. Question
Circuit breakers usually operate under …..
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Question 9 of 25
9. Question
What is the making capacity of the circuit breaker?
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Question 10 of 25
10. Question
A three phase circuit breaker is rated 2000 MVA, 33 kV. What will be its making current?
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Question 11 of 25
11. Question
The breaking capacity of a three-phase circuit breaker is given by …..
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Question 12 of 25
12. Question
What is the making to breaking current ratio for an extra high voltage circuit breaker?
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Question 13 of 25
13. Question
What is the major cause of the failure of the circuit breaker?
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Question 14 of 25
14. Question
Which of the following circuit breakers has the lowest operating voltage?
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Question 15 of 25
15. Question
The interrupting time of a circuit breaker is the period between the instant of …..
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Question 16 of 25
16. Question
For a high-speed circuit breaker, what will the total clearing time be?
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Question 17 of 25
17. Question
What is restriking voltage?
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Question 18 of 25
18. Question
In a circuit breaker, the active recovery voltage depends upon which among these?
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Question 19 of 25
19. Question
On what factor does the rate of rising of restriking voltage (RRRV) depend?
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Question 20 of 25
20. Question
The making and breaking currents of three-phase AC circuit breakers in power systems are respectively in ….. form
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Question 21 of 25
21. Question
Which type of air is used in an air blast circuit breaker?
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Question 22 of 25
22. Question
While using an air blast circuit breaker, current chopping is a phenomenon observed when …..
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Question 23 of 25
23. Question
Why is the resistance switching used in a air blast circuit breaker?
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Question 24 of 25
24. Question
In axial blast type of CB, expansion of air takes place from …..
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Question 25 of 25
25. Question
The air blast circuit breakers for 400 kV systems are designed to operate in how much time?