Power System MCQ #15

Power system MCQ 205 to 208:

205) Induction cup relay is operated due to changes in

        (a) Current

        (b) Voltage

        (c) Impedance

        (d) All of the above

206) Which relay is used for phase fault on short transmission line.

        (a) Induction type

        (b) Reactance

        (c) Impedance

        (d) None of the above

207) Negative sequence current is provided for which of the following protection?

        (a) Generator

        (b) Transmission line

        (c) Transformer

        (d) Motor

208) The single phasing relays are used for the protection of

        (a) single phase motor only

        (b) two phase motor only

        (c) two single phase motor running in parallel

        (d) three phase motor

ANSWER: | 205-d | 206-b | 207-a | 208-d |

Power system MCQ 209 to 212:

209) Which of the following parameter can neglect for the representation of the short transmission line.

        (a) Resistance

        (b) Capacitance

        (c) Inductance

        (d) Reactance

210) The under-voltage relay is used for

        (a) Generators

        (b) Bus-bars

        (c) Transformers

        (d) All of the above

211) Which device receive voltage surge first in the transmission system?

        (a) Relay

        (b) Lightning arresters

        (c) Switchgears

        (d) Step-down transformer

212) Admittance relay is ______ relay.

        (a) Directional

        (b) Non-directional

        (c) Impedance

        (d) None of the above

ANSWER: | 209-b | 210-d | 211-b | 212-a |

Power system MCQ 213 to 216:

213) The fuse blows off by

      (a) Burning

      (b) Arcing

      (c) Melting

      (d) None of the above

214) The power loss is an important factor for design of

      (a) Motor

      (b) Generator

      (c) Transmission line

      (d) Feeder

215) Fuse is not used beyond ___A

      (a) 20

      (b) 100

      (c) 200

      (d) 50

216) A switchgear device is used for which purpose?

      (a) Interrupting an electrical circuit

      (b) Switching an electrical equipment

      (c) Controlling an electrical circuit and equipment

      (d) Switching, controlling and protecting an electrical circuit and equipment

ANSWER: | 213-c | 214-c | 215-b | 216-d |