Switchgear and Protection

A. Radiation
B. Convection
C. Conduction
D. All of the above

A. zero sequence currents only
B. positive sequence currents only
C. negative and zero sequence currents
D. zero, negative and positive sequence currents

A. no current flow
B. heavy current flow
C. voltage drop
D. voltage rise

A. earth wires
B. isolators
C. H.R.C. fuses
D. reactors

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

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

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

A. Open circuit
B. Short-circuit
E. Long
D. None 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