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
Related Mcqs:
- Bus coupler is very essential in arrangement______________?
A. single bus
B. double bus, double breaker
C. main and transfer bus
D. all of the above - The single phasing relays are used for the protection of_____________?
A. single phase motors only
B. two phase motors only
C. two single phase motors running in parallel
D. three phase motors - Overload relays are of_______________type
A. induction
B. solid state
C. thermal
D. electromagnetic
E. all above - A differential relay measures the vector difference between_________________?
A. two currents
B. two voltages
C. two or more similar electrical quantities
D. none of the above - When a transmission line is energized, the wave that propagates on it is____________?
A. current wave only
B. voltage wave only
C. Both (A) and (B)
D. power factor wave only - The delay fuses are used for the protection of ___________?
A. motors
B. power outlet circuits
C. fluorescent lamps
D. light circuits - For cost and safety, the outdoor substations are installed for voltages above_________________?
A. 11 kV
B. 33 kV
C. 60kV
D. 110kV - The inverse definite mean time relays are used for over current and earth fault protection of transformer against_________________?
A. heavy loads
B. internal short-circuits
C. external short-circuits
D. all 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
E. none of the above - The steady state stability of the power system can be increased by_____________?
A. connecting lines in parallel
B. connecting lines in series
E. using machines of high impedance
D. reducing the excitation of machines
E. none of the above
