Multiple Choice
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
Correct Answer:
Verified
Correct Answer:
Verified
Q15: In a circuit breaker the basic problem
Q16: Ionization in circuit breaker is facilitated by<br>A)high
Q17: The voltage appearing across the contacts after
Q18: Resistance grounding is used for voltage between<br>A)33kVto66kV<br>B)HkVto33kV<br>C)3.3kVandllkV<br>D)none
Q19: Interruption of large currents by relay requires<br>A)arc
Q20: Which of the following is the least
Q21: In Railway applications _ circuit breaker is
Q23: The ground wire should not be smaller
Q24: H.R.C. fuses provide best protection against<br>A)overload<br>B)reverse current<br>C)open-circuits<br>D)short-circuits
Q25: The contacts of high voltage switches used