A. 100 microsecond
B. 50 millisecond
C. 0.5 sec
D. 0.1 sec
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Related Mcqs:
- The current zero interruption, in oil and air blast circuit breakers, is achieved by_______________?
- A. lengthening of the gap B. cooling and blast effect C. both A. and B D. deionizing the oil with forced air E. none of the above...
- The current zero interruption, in oil and air blast circuit breakers, is achieved by____________?
- A. lengthening of the gap B. cooling and blast effect C. both (A) and (B) D. deionizing the oil with forced air E. none of the above...
- Circuit breakers usually operate under______________?
- A. transient state of short-circuit current B. sub-transient state of short-circuit current C. steady state of short-circuit current D. after D.C. component has ceased...
- Circuit breakers are essentially____________?
- A. current carrying contacts called electrodes B. arc extinguishers C. circuits to break the system D. transformers to isolate the two systems E. any of the above...
- Circuit breakers are essentially______________?
- A. current carrying contacts called electrodes B. arc extinguishers C. circuits to break the system D. transformers to isolate the two systems E. any of the above...
- The time of closing the cycle, in modern circuit breakers is_____________?
- A. 0.003 sec B. 0.001 sec C. 0.01 sec D. 0.10 sec E. none of the above...
- Insulation resistance of high voltage circuit breakers is more than________________?
- A. 1 mega ohms B. 10 mega ohms C. 100 mega ohms D. 500 mega ohms...
- Which of the following circuit breakers has high reliability and minimum maintenance ?
- A. Air blast circuit breakers B. Circuit breaker with SF6 gas C. Vacuum circuit breakers D. Oil circuit breakers...
- Air blast circuit breaker is used for_____________?
- A. over currents B. short duty C. intermittant duty D. repeated duty...
- Which of the following medium is employed for extinction of arc in air circuit breaker?
- A. Water B. Oil C. Air D. SF6...
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