Switch Gear The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to insulate the contacts from switch body All of these extinguish the arc lubricate the contacts None of these insulate the contacts from switch body All of these extinguish the arc lubricate the contacts None of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The operating time of a circuit breaker is 0.001 sec 0.2 sec 0.05 sec 0.002 sec 0.001 sec 0.2 sec 0.05 sec 0.002 sec ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The rated secondary current of current transformer for relays is generally 30 A 20 A 10 A 5 A 30 A 20 A 10 A 5 A ANSWER DOWNLOAD EXAMIANS APP
Switch Gear To limit short-circuit current in a power system are used H.R. fuses earth wires reactors isolators H.R. fuses earth wires reactors isolators ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Circuit breakers usually operate under after dc component has ceased sub-transient state of short circuit current steady state of short circuit current transient state of short circuit current after dc component has ceased sub-transient state of short circuit current steady state of short circuit current transient state of short circuit current ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A fuse should have high conductivity All of these low melting point low cost high conductivity All of these low melting point low cost ANSWER DOWNLOAD EXAMIANS APP
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