Switch Gear Air blast circuit breakers for 400 kV power system are designed to operate in 100 micro-second 50 milli-second 0.5 sec 0.1 sec 100 micro-second 50 milli-second 0.5 sec 0.1 sec ANSWER DOWNLOAD EXAMIANS APP
Switch Gear In a single bus-bar system there will be complete shut down when fault occurs on the bus itself fault occurs on neutral line two or more faults occur simultaneously fault occurs with respect to earthing fault occurs on the bus itself fault occurs on neutral line two or more faults occur simultaneously fault occurs with respect to earthing ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Overheating of relay contacts or contact born out is due to too low contact pressure slow making and breaking of load circuit contacts all of these foreign matter on the contact surface too low contact pressure slow making and breaking of load circuit contacts all of these foreign matter on the contact surface ANSWER DOWNLOAD EXAMIANS APP
Switch Gear An isolator is installed as a substitute for circuit breaker generally on both sides of a circuit breaker to operate the relay of circuit breaker always independent of the position of circuit breaker as a substitute for circuit breaker generally on both sides of a circuit breaker to operate the relay of circuit breaker always independent of the position of circuit breaker ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The fuse wire, in DC circuit, is inserted in negative circuit only None of these Both positive and negative circuit positive circuit only negative circuit only None of these Both positive and negative circuit positive circuit only 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 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 None of these All of these lubricate the contacts ANSWER DOWNLOAD EXAMIANS APP
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