The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to______________?

Related Mcqs:

Circuit breakers are essentially____________?

A. current carrying contacts called electrodes B. arc extinguishers C. circuits to break the system D. transformers to isolate the two systems E. any of the above...

Relays can be designed to respond to changes in________________?

A. resistance, reactance or impedance B. voltage and current C. light intensity D. temperature E. all above...

For the protection of power station buildings against direct strokes the requirements are___________?

A. interception B. interception and conduction C. interception, conduction and dissipation D. interception, conduction, dissipation and reflection E. none of the above...

In a single bus-bar system there will be complete shut down when____________?

A. fault occurs on the bus itself B. fault occurs on neutral line C. two or more faults occur simultaneously D. fault occurs with respect to earthing...

The information to the circuit breaker under fault conditions is provided by____________?

A. relay B. rewirable fuse C. H.R.C. only D. all of the above...