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 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 ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The material used for fuse must have low melting point and high specific resistance low melting point and any specific resistance high melting point and low specific resistance Low melting point and low specific resistance low melting point and high specific resistance low melting point and any specific resistance high melting point and low specific resistance Low melting point and low specific resistance ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A circuit breaker is rated as 1500 A, 1000 MVA, 33 kv, 3-second , 3- phase oil circuit breaker. The rated normal current is 750 A 1500 A 1500/√3 A None of these 750 A 1500 A 1500/√3 A None of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear To protect most of the electrical equipment handling low power, the types of relays used are Thermocouple None of these Both of the listed here Electronic and bimetallic Thermocouple None of these Both of the listed here Electronic and bimetallic ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The arcing contacts in a circuit breaker are made of copper tungsten alloy aluminium alloy porcelain electrolytic copper copper tungsten alloy aluminium alloy porcelain electrolytic copper ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The arc voltage produced in AC circuit breaker is always leading the arc current by 90° None of these lagging the arc current by 90° In phase with the arc current leading the arc current by 90° None of these lagging the arc current by 90° In phase with the arc current ANSWER DOWNLOAD EXAMIANS APP
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