Switch Gear The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to lubricate the contacts All of these None of these insulate the contacts from switch body extinguish the arc lubricate the contacts All of these None of these insulate the contacts from switch body extinguish the arc ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Most of the relays on service on electric power system are electronic relays electro-mechanical relays thermal relays None of these electronic relays electro-mechanical relays thermal relays None of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The time-current graph of a fuse has a linear characteristic None of these is a circle has inverse characteristic has a linear characteristic None of these is a circle has inverse characteristic ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The pick-up current of a relay is 7.5 A and the fault current in relay is 30 A. Its plug-setting multiplier (P.S.M.) is 8 4 2 6 8 4 2 6 ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The making capacity of a circuit breaker is equal to √2 × symmetrical breaking capacity None of these 2.55 × symmetrical breaking capacity √3 × symmetrical breaking capacity √2 × symmetrical breaking capacity None of these 2.55 × symmetrical breaking capacity √3 × symmetrical breaking capacity ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A fuse is never inserted in phase line negative of dc circuit positive of dc circuit neutral wire phase line negative of dc circuit positive of dc circuit neutral wire ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS