Multiple Choice
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
Correct Answer:
Verified
Correct Answer:
Verified
Q1: Air blast circuit breaker is used for<br>A)over
Q2: Circuit breakers usually operate under<br>A)transient state of
Q3: Arc in a circuit behaves as<br>A)a capackive
Q4: The arcing contacts in a circuit breaker
Q6: Thermal circuit breaker has<br>A)delayed trip action<br>B)instantaneous trip
Q7: A differential relay measures the vector difference
Q8: Thermal overload relays are used to protect
Q9: Fault diverters are basically<br>A)fuses<br>B)relays<br>C)fast switches<br>D)circuit breakers
Q10: Magnetic circuit breaker has _ trip action.<br>A)delayed<br>B)instantaneous<br>C)both
Q11: An efficient and a well designed protective