The relay operating speed depends upon
A) the spring tension
B) the rate of flux built up
C) armature core air gap
D) all of the above
Correct Answer:
Verified
Q11: Relays can be designed to respond to
Q12: Overload relays are of…… type.
A)induction
B)solid state
C)thermal
D)all above
Q13: Thermal overload relays are used to protect
Q14: Magnetic circuit breaker has _ trip action.
A)delayed
B)instantaneous
C)both
Q15: D.C. shunt relays are made of
A)few turns
Q17: In order that current should flow without
Q18: Circuit breakers usually operate under
A)transient state of
Q19: Circuit breakers are essentially
A)current carrying contacts called
Q20: The current zero interruption, in oil and
Q21: Air blast circuit breaker is used for
A)over
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