Power System MCQ #20

Power System MCQ 265 to 268:

265) In electrical power system network, which part operates in the highest voltage level?

      (a) Generating station

      (b) Transmission system

      (c) Distribution system

      (d) Load

266) The reliability of power system is _____ in mesh type network compared to the nodal type network.

      (a) high

      (b) low

      (c) same as

      (d) high or low

267) The mesh type network is also known as _____ type network.

      (a) Radial

      (b) Longitudinal

      (c) Loop

      (d) None of the above

268) In underground distribution system, low tension cables used in ______ voltage level.

      (a) below 1000 V

      (b) up to 11 kV

      (c) between 22 kV to 33 kV

      (d) more than 33 kV

ANSWER:  | 265-b | 266-a | 267-c | 268-a |

Power System MCQ 268 to 272:

269) For insulation in underground cable, the dielectric constant of PVC is ____.

      (a) 3.5

      (b) 2

      (c) 10

      (d) 5

270) A _______ is a bus where active power (P) and reactive power (Q) are known.

      (a) generator bus

      (b) load bus

      (c) slack bus

      (d) none of the above

271) A _______ is a bus where magnitude of bus voltage (V) and the corresponding generated power (P) are known.

      (a) generator bus

      (b) load bus

      (c) slack bus

      (d) none of the above

272) A _______ is a bus where magnitude of bus voltage (V) and phase angle of bus voltage are specified.

      (a) generator bus

      (b) load bus

      (c) slack bus

      (d) none of the above

ANSWER: | 269-d | 270-b | 271-a | 272-c |

Power System MCQ 273 to 276:

273) ______ is used when a generating unit is to be taken out for maintenance or repair.

      (a) Hot reserve

      (b) Cold reserve

      (c) Spinning reserve

      (d) Operating reserve

274) _____ is provided to meet the load demand under forced outage condition.

      (a) Hot reserve

      (b) Cold reserve

      (c) Spinning reserve

      (d) none of the above

275) ______ is provided to meet minute to minute load variations and any extra load due to load forecasting errors.

      (a) Hot reserve

      (b) Cold reserve

      (c) Spinning reserve

      (d) none of the above

276) A ______ is a failure in a power system of interconnected parts in which the failure of a part can triggers the failure of successive parts.

      (a) Brown out

      (b) Black out

      (c) Cascade tripping

      (d) B and C both

ANSWER: | 273-b | 274-a | 275-c | 276-d |

Power System MCQ #19