Category: Switchgear and Protection

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

A. is yellow in colour
B. is lighter than air
C. is nontoxic
D. has pungent small
E. none of the above

A. Generators
B. Motors
C. Transmission line
D. Transformers

A. slow making and breaking of load circuit contacts
B. foreign matter on the contact surface
C. too low contact pressure
D. all of the above

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. reactors
B. resistors
C. capacitors
D. none of the above

A. induction
B. solid state
C. thermal
D. electromagnetic
E. all above

A. Impedance
B. Reactance
C. Either of the above
D. None of the above

A. power frequencies
B. higher frequencies entering generator or transformer units
C. either of the above
D. none of the above

A. transmission line
B. motor
C. generator
D. feeder