Circuit breakers are essentially
A) current carrying contacts called electrodes
B) arc extinguishers
C) circuits to break the system
Correct Answer:
Verified
Q14: Magnetic circuit breaker has _ trip action.
A)delayed
B)instantaneous
C)both
Q15: D.C. shunt relays are made of
A)few turns
Q16: The relay operating speed depends upon
A)the spring
Q17: In order that current should flow without
Q18: Circuit breakers usually operate under
A)transient state of
Q20: The current zero interruption, in oil and
Q21: Air blast circuit breaker is used for
A)over
Q22: An efficient and a well designed protective
Q23: Burden of a protective relay is the
Q24: Directional relays are based on flow of
A)power
B)current
C)voltage
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