Switch Gear Arc in a circuit breaker behaves as an inductive reactance a resistance increasing with voltage rise across the arc a resistance decreasing with voltage rise across the arc a capacitive reactance an inductive reactance a resistance increasing with voltage rise across the arc a resistance decreasing with voltage rise across the arc a capacitive reactance ANSWER DOWNLOAD EXAMIANS APP
Switch Gear If the length of the arc in a circuit breaker increases, its resistance increases remains same decreases None of these increases remains same decreases None of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A circuit breaker must perform the duty of opening the faulty circuit and breaking the fault current carrying fault current for a short time being closed on to a fault All of these opening the faulty circuit and breaking the fault current carrying fault current for a short time being closed on to a fault All of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The voltage appearing across the contacts after opening of the circuit breaker is called recovery voltage operating voltage surge voltage arc voltage recovery voltage operating voltage surge voltage arc voltage ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The arc voltage produced in AC circuit breaker is always In phase with the arc current None of these lagging the arc current by 90° leading the arc current by 90° In phase with the arc current None of these lagging the arc current by 90° leading the arc current by 90° 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 6 8 2 4 6 8 2 4 ANSWER DOWNLOAD EXAMIANS APP
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