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

Overfluxing protection is recommended for_____________?

A. distribution transformer
B. generator transformer of the power plant
C. auto-transformer of the power plant
D. station transformer of the power plant

If the fault occurs near the impedance relay, the VII ratio will be____________?

A. constant for all distances
B. lower than that of if fault occurs away from the relay
C. higher than that of if fault occurs away from the relay
D. none of the above

The inductive interference between power and communication line can be minimized by__________?

A. transposition of the power line
B. transposition of the communication line
C. both (a) and (b)
D. increasing the distance between the conductors

transmission line has reflection coefficient as one?

A. open circuit
B. short-circuit
E. long
D. none of the above

The relay with inverse time characteristic will operate within____________?

A. 1.5 sec
B. 5 to 10 sec
C. 5 to 20 sec
D. 20 to 30 sec

Which of the following devices will receive voltage surge first travelling on the transmission line ?

A. lightning arresters
B. relays
C. step-down transformer
D. switchgear

A _________ is used to measure the stator % winding temperature of the generator?

A. thermocouple
B. pyrometer
C. resistance thermometer
D. thermometer

Distance relays are generally_____________?

A. split-phase relays
B. reactance relays
C. impedance relays
D. none of the above

relays are used for phase faults on long line?

A. impedance
B. reactance
C. either of the above
D. none of the above