Switch Gear The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to extinguish the arc insulate the contacts from switch body None of these lubricate the contacts All of these extinguish the arc insulate the contacts from switch body None of these lubricate the contacts All of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Air blast circuit breakers for 400 kV power system are designed to operate in 0.1 sec 50 milli-second 100 micro-second 0.5 sec 0.1 sec 50 milli-second 100 micro-second 0.5 sec ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The relay operating speed depends upon the spring tension All of these the rate of flux built up armature core air gap the spring tension All of these the rate of flux built up armature core air gap ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A circuit breaker is a None of these circuit interrupting device current controlling device current limiting device None of these circuit interrupting device current controlling device current limiting device ANSWER DOWNLOAD EXAMIANS APP
Switch Gear For interrupting of high voltage and low current, the circuit breaker prefered is vaccum circuit breaker all are correct air-blast circuit breaker oil circuit breaker vaccum circuit breaker all are correct air-blast circuit breaker oil circuit breaker ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The fault that imposes severest duty on the circuit breaker is line to ground fault all three lines short-circuited line to line fault two lines to ground fault line to ground fault all three lines short-circuited line to line fault two lines to ground fault ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS