Circuit Breakers » Exercise - 15. For high voltage, ac circuit breakers, the rated short circuit current is passed for : (a) 0.01 sec (b) 0.1 sec (c) 3 seconds (d) 30 seconds
Transformer » Exercise - 18. If the primary power of an ideal transformer having a 2:1 voltage ratio is 100 W, the secondary power is : (a) 50 W (b) 75 W (c) 100 W (d) 200 W
Circuit Breakers » Exercise - 12. The fault clearing time of a circuit breaker is usually : (a) few minutes (b) few seconds (c) one second (d) few cycles of supply voltage
Circuit Breakers » Exercise - 14. Which of the following circuit breakers is preferred for EHT application : (a) Air blast circuit breakers (b) Minimum oil circuit breakers (c) Bulk oil circuit breakers (d) SF6 oil circuit breakers