Multiple Choice
A transmission line is protected by
A) inrush protection
B) distance protection
C) time graded and current graded over current protection
D) both (B) and (C)
Correct Answer:
Verified
Correct Answer:
Verified
Q13: The relay operating speed depends upon<br>A)the spring
Q14: Circuit breakers usually operate under<br>A)transient state of
Q15: Thermal circuit breaker has<br>A)delayed trip action<br>B)instantaneous trip
Q16: Which of the following medium is employed
Q17: Magnetic circuit breaker has _ trip action.<br>A)delayed<br>B)instantaneous<br>C)both
Q19: Thermal overload relays are used to protect
Q20: A thermal protection switch can protect against<br>A)short-circuit<br>B)temperature<br>C)overload<br>D)over
Q21: Burden of a protective relay is the
Q22: An efficient and a well designed protective
Q23: On which of the following routine tests