Multiple Choice
The arcing contacts in a circuit breaker are made of
A) copper tungsten alloy
B) porcelain
C) electrolytic copper
D) aluminium alloy
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
Q5: The current zero interruption, in oil and
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