Switch Gear The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to insulate the contacts from switch body lubricate the contacts All of these extinguish the arc None of these insulate the contacts from switch body lubricate the contacts All of these extinguish the arc None of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Back up protection is generally used for protection against both open and short-circuit faults None of these open-circuit faults only short-circuit faults only both open and short-circuit faults None of these open-circuit faults only short-circuit faults only ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The relay operating speed depends upon the spring tension armature core air gap All of these the rate of flux built up the spring tension armature core air gap All of these the rate of flux built up ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Which of the following is used in liquid fuses ? sulphur hexafluoride transformer oil distilled water carbon tetrachloride sulphur hexafluoride transformer oil distilled water carbon tetrachloride ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The main function of a fuse is to None of these prevent excessive currents open the circuit protect the appliance protect the line None of these prevent excessive currents open the circuit protect the appliance protect the line ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Minimum arcing voltage will be least in case of tungsten graphite silver carbon tungsten graphite silver carbon ANSWER DOWNLOAD EXAMIANS APP
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