Category: Switchgear and Protection

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

A. maintain the arc
B. extinguish the arc
C. transmit large power
D. emit the ionizing electrons

A. tapping
B. load end
C. sending end
D. sending and other end
E. all of the above

A. 1.5 sec
B. 5 to 10 sec
C. 5 to 20 sec
D. 20 to 30 sec
E. none of the above

A. low resistance
B. high resistance
C. low impedance
D. high impedance

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

A. zero
B. infinity
C. unity
D. none of the above

A. motors
B. power outlet circuits
C. fluorescent lamps
D. light circuits

A. 20 A
B. 50 A
C. 100 A
D. 200 A

A. Open circuit
B. Short-circuit
E. Long
D. None of the above