Switchgear Protections - Interview Questions | Exam2Win

Take a timed mock test specifically for Switchgear Protections.

61. The single phasing relays are used for the protection of

A. single phase motors only

B. two phase motors only

C. two single phase motors running in parallel

D. three phase motors

Explanation:

62. Series reactors should have

A. low resistance

B. high resistance

C. low impedance

D. high impedance

Explanation:

63. For cost and safety, the outdoor substa tions are installed for voltages above

A. 11 kV

B. 33 kV

C. 60kV

D. 110kV

Explanation:

64. For which of the following ratings of the transformer differential protection is recommended ?

A. above 30 kVA.

B. equal to and above 5 MVA

C. equal to and above 25 MVA

D. none of the above

Explanation:

65. A _______ is used to measure the stator % winding temperature of the generator.

A. thermocouple

B. pyrometer

C. resistance thermometer

D. thermometer

Explanation: