Switch Gear An efficient and a well designed protective relaying should have economy and simplicity good selectivity and reliability high speed and selectivity All of these economy and simplicity good selectivity and reliability high speed and selectivity All of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The single phasing relays are used for the protection of three phase motors two single phase motors running in parallel single phase motors only two phase motors only three phase motors two single phase motors running in parallel single phase motors only two phase motors only ANSWER DOWNLOAD EXAMIANS APP
Switch Gear When a fault occur in a power system, the circuit breaker opens automatically is opened by remote control None of these is opened manually opens automatically is opened by remote control None of these is opened manually ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Circuit breakers usually operate under steady state of short circuit current after dc component has ceased sub-transient state of short circuit current transient state of short circuit current steady state of short circuit current after dc component has ceased sub-transient state of short circuit current transient state of short circuit current ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Most of the relays on service on electric power system are electro-mechanical relays electronic relays None of these thermal relays electro-mechanical relays electronic relays None of these thermal relays ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Back up protection is generally used for protection against open-circuit faults only both open and short-circuit faults short-circuit faults only None of these open-circuit faults only both open and short-circuit faults short-circuit faults only None of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS