Switch Gear The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to lubricate the contacts None of these insulate the contacts from switch body extinguish the arc All of these lubricate the contacts None of these insulate the contacts from switch body extinguish the arc All of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Circuit breakers usually operate under transient state of short circuit current sub-transient state of short circuit current steady state of short circuit current after dc component has ceased transient state of short circuit current sub-transient state of short circuit current steady state of short circuit current after dc component has ceased ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The device that detects the fault in a power system is isolator circuit breaker None of these relay isolator circuit breaker None of these relay ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A short-circuit is identified by voltage drop voltage rise heavy current flow no current flow voltage drop voltage rise heavy current flow no current flow ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The main function of a fuse is to protect the appliance prevent excessive currents protect the line None of these open the circuit protect the appliance prevent excessive currents protect the line None of these open the circuit ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The voltage appearing across the contacts after opening of the circuit breaker is called surge voltage recovery voltage arc voltage operating voltage surge voltage recovery voltage arc voltage operating voltage ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS