Switch Gear The making capacity of a circuit breaker is equal to √2 × symmetrical breaking capacity √3 × symmetrical breaking capacity 2.55 × symmetrical breaking capacity None of these √2 × symmetrical breaking capacity √3 × symmetrical breaking capacity 2.55 × symmetrical breaking capacity None of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear In a circuit breaker the time duration from the instant of the fault to extinction of arc is known as operation time lag time lead time clearing time operation time lag time lead time clearing time ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A short-circuit is identified by no current flow voltage drop voltage rise heavy current flow no current flow voltage drop voltage rise heavy current flow ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The normal current in a power line is 100 A. If a short-circuit fault occurs on the line, then one can expect the short-circuit current to be more than 1000 A 100 A 300 A 200 A more than 1000 A 100 A 300 A 200 A 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 extinguish the arc None of these lubricate the contacts All of these insulate the contacts from switch body extinguish the arc None of these lubricate the contacts All of these insulate the contacts from switch body ANSWER DOWNLOAD EXAMIANS APP
Switch Gear In Railway applications ______ circuit breaker is used. minimum oil bulk oil air break SFe minimum oil bulk oil air break SFe ANSWER DOWNLOAD EXAMIANS APP
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