Switchgear Protections MCQ Questions & Answers | Electrical Engineering

A. to operate the relay of circuit breaker

B. as a substitute for circuit breaker

C. always independent of the position of circuit breaker

D. generally on both sides of a circuit breaker

A. transient state of short-circuit current

B. sub-transient state of short-circuit current

C. steady state of short-circuit current

D. after D. C. component has ceased

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. reactors

B. resistors

C. capacitors

D. none of the above

A. overload

B. reverse current

C. open-circuits

D. short-circuits

A. few turns of thin wire

B. few turns of thick wire

C. many turns of thin wire

D. many turns of thick wire

A. Induction type

B. Reactance

C. Impedance

D. None of the above

A. interception

B. interception and conduction

C. interception, conduction and dissipation

D. interception, conduction, dissipation and reflection

E. none of the above

A. protect the line

B. open the circuit

C. protect the appliance

D. prevent excessive currents

E. none of the above

A. relay

B. rewirable fuse

C. H.R.'only

D. all of the above