Multiple Choice
Interruption of large currents by relay requires
A) arc suppressing blow out coils
B) wide separation of the opened contacts
C) high speed opening of contacts
D) all of the above
Correct Answer:

Verified
Correct Answer:
Verified
Q14: Insulation resistance of high voltage circuit breakers
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
Q20: Which of the following is the least
Q21: In Railway applications _ circuit breaker is
Q22: The time of closing the cycle, in
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