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 extinguish the arc All of these lubricate the contacts insulate the contacts from switch body None of these extinguish the arc All of these lubricate the contacts insulate the contacts from switch body ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A three phase circuit breaker is rated at 2000 MVA, 33 kv. The symmetrical breaking current is 35 kA 20 kA 60 kA 80 kA 35 kA 20 kA 60 kA 80 kA ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The reflection co-efficient at the open circuited end of a transmission line unity infinity None of these zero unity infinity None of these zero ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The transient voltage that appears across the contacts at the instant of arc extinction is called restriking voltage peak voltage recovery voltage supply voltage restriking voltage peak voltage recovery voltage supply voltage ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Interruption of large currents by relay requires arc suppressing blow out coils wide separation of the opened contacts all of these high speed opening of contacts arc suppressing blow out coils wide separation of the opened contacts all of these high speed opening of contacts ANSWER DOWNLOAD EXAMIANS APP
Switch Gear For the same power, the least size is of vaccum circuit breaker oil circuit breaker air-blast circuit breaker sf6 circuit breaker vaccum circuit breaker oil circuit breaker air-blast circuit breaker sf6 circuit breaker ANSWER DOWNLOAD EXAMIANS APP
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