Switch Gear The time of closing the cycle, in modern circuit breakers is 0.10 sec 0.001 sec 0.01 sec 0.003 sec 0.10 sec 0.001 sec 0.01 sec 0.003 sec ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A short-circuit is identified by heavy current flow voltage rise no current flow voltage drop heavy current flow voltage rise no current flow voltage drop ANSWER DOWNLOAD EXAMIANS APP
Switch Gear An efficient and a well designed protective relaying should have economy and simplicity good selectivity and reliability All of these high speed and selectivity economy and simplicity good selectivity and reliability All of these high speed and selectivity ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The arc voltage produced in AC circuit breaker is always None of these leading the arc current by 90° In phase with the arc current lagging the arc current by 90° None of these leading the arc current by 90° In phase with the arc current lagging the arc current by 90° ANSWER DOWNLOAD EXAMIANS APP
Switch Gear In a single bus-bar system there will be complete shut down when fault occurs on neutral line two or more faults occur simultaneously fault occurs on the bus itself fault occurs with respect to earthing fault occurs on neutral line two or more faults occur simultaneously fault occurs on the bus itself fault occurs with respect to earthing ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The transient voltage that appears across the contacts at the instant of arc extinction is called supply voltage restriking voltage peak voltage recovery voltage supply voltage restriking voltage peak voltage recovery voltage ANSWER DOWNLOAD EXAMIANS APP
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