Switchgear Protections MCQ Questions & Answers | Electrical Engineering

A. the spring tension

B. the rate of flux built up

C. armature core air gap

D. all of the above

A. burning

B. arcing

C. melting

D. none of the above

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. low currents circuits

B. low voltages circuits

C. high voltages and large currents circuits

D. all circuits

A. Air blast circuit breakers

B. Circuit breaker with SF6 gas

C. Vacuum circuit breakers

D. Oil circuit breakers

A. above 30 kV

B. equal to and above 5 MVA

C. equal to and above 25 MVA

D. none of the above

A. tapping

B. load end

C. sending end

D. sending and other end

E. all of the above

A. Water

B. Oil

C. Air

D. SF₆

A. current during abnormal condition

B. voltage during abnormal condition

C. constantly the electrical quantities which differ during normal and abnormal conditions

D. none of the above

A. neutral wire

B. negative of D.C. circuit

C. positive of D.C. circuit

D. phase dine