Switch Gear The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to None of these insulate the contacts from switch body lubricate the contacts extinguish the arc All of these None of these insulate the contacts from switch body lubricate the contacts extinguish the arc All of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Wave trap is used to trap waves of power frequencies higher frequencies entering generator or transformer units None of these either of the above power frequencies higher frequencies entering generator or transformer units None of these either of the above ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Arc in a circuit breaker behaves as a resistance decreasing with voltage rise across the arc an inductive reactance a capacitive reactance a resistance increasing with voltage rise across the arc a resistance decreasing with voltage rise across the arc an inductive reactance a capacitive reactance a resistance increasing with voltage rise across the arc ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Minimum arcing voltage will be least in case of tungsten silver graphite carbon tungsten silver graphite carbon ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Dc shunt relays are made of few turns of thick wire few turns of thin wire many turns of thick wire many turns of thin wire few turns of thick wire few turns of thin wire many turns of thick wire many turns of thin wire ANSWER DOWNLOAD EXAMIANS APP
Switch Gear To limit short-circuit current in a power system are used H.R. fuses isolators reactors earth wires H.R. fuses isolators reactors earth wires ANSWER DOWNLOAD EXAMIANS APP
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