Switch Gear Back up protection is generally used for protection against open-circuit faults only short-circuit faults only None of these both open and short-circuit faults open-circuit faults only short-circuit faults only None of these both open and short-circuit faults ANSWER DOWNLOAD EXAMIANS APP
Switch Gear protection of fuses is generally not used beyond 200 A 20 A 50 A 100 A 200 A 20 A 50 A 100 A ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to None of these All of these lubricate the contacts insulate the contacts from switch body extinguish the arc None of these All of these lubricate the contacts insulate the contacts from switch body extinguish the arc ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The voltage appearing across the contacts after opening of the circuit breaker is called operating voltage recovery voltage arc voltage surge voltage operating voltage recovery voltage arc voltage surge voltage ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The relay operating speed depends upon the spring tension armature core air gap All of these the rate of flux built up the spring tension armature core air gap All of these the rate of flux built up ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A circuit breaker is rated as 1500 A, 1000 MVA, 33 kv, 3-second , 3- phase oil circuit breaker. The rated normal current is None of these 1500/√3 A 750 A 1500 A None of these 1500/√3 A 750 A 1500 A ANSWER DOWNLOAD EXAMIANS APP
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