Switchgear Protections - Interview Questions | Exam2Win

Take a timed mock test specifically for Switchgear Protections.

21. The voltage appearing across the contacts after opening of the circuit breaker is called______voltage.

A. recovery

B. surge

C. operating

D. arc

Explanation:

22. For the protection of power station buildings against direct strokes the requirements are

A. interception

B. interception and conduction

C. interception, conduction and dis-sipation

D. interception, conduction, dissipation and reflection

Explanation:

23. On which of the following routine tests are conducted ?

A. Oil circuit breakers

B. Air blast circuit breakers

C. Minimum oil circuit breakers

D. All of the above

Explanation:

24. Large internal faults are protected by

A. merz price percentage differential protection

B. mho and ohm relays

C. horn gaps and temperature relays

D. earth fault and positive sequence relays

Explanation:

25. Ionization in circuit breaker is facilitated by

A. high temperature

B. increase of mean free path

C. increasing field strength

D. all of the above

Explanation: