17th
Apr
Power Systems MCQ

Power Systems MCQ

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  • 17th Apr, 2021
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Power Systems MCQ Test

Following are mostly asked Power systems MCQ test that are designed for professionals like you to crack you interviews. You can take this Power systems online test before appearing to you real interview. This Power systems quiz there are around 30+ multiple choice questions on Power systems with four options.

1) Shunt compensation in an EHV line is used to improve

  • A. Stability, fault level and voltage profile
  • B. Fault level and voltage profile
  • C. Voltage profile and stability
  • D. Stability and fault level

2) In a load flow study a PV bus is treated as a PQ bus when

  • A. Phase angle is high
  • B. Voltage limit is violated
  • C. Reactive power limit is violated
  • D. Phase angle is high

3) For a transmission line the standing wave ratio is the ratio of

  • A. Maximum impedance to minimum impedance
  • B. Maximum voltage to minimum voltage
  • C. Peak voltage to rms voltage
  • D. Maximum current to minimum current

4) With the help of a reactive compensator, it is possible to have

  • A. Unity p.f. operation only
  • B. Constant voltage operation only
  • C. Either constant voltage or unity p.f.
  • D. Both constant voltage and unity p.f.

5) In case of 3 phase short circuit in a system, the power fed into the system is

  • A. Mostly Reactive
  • B. Mostly active
  • C. Both active and reactive power are equal
  • D. None of the above
Download Free : Power Systems MCQ PDF

6) The synchronous motor connected to an infinite bus takes power at a lag p.f. If its excitation is increased

  • A. Load angle increase
  • B. Power factor Increase
  • C. Terminal Voltage increase
  • D. None of the above

7) The insulation of modern EHV and UHV lines is designed based on

  • A. Radio interface
  • B. Switching voltage
  • C. Corona
  • D. Switching voltage

8) The function of the earth wire in an extra high voltage line is to

  • A. Prevent earth fault
  • B. Provide mechanical strength to the towers
  • C. Provide a safety measure of any high-flying object
  • D. Provide a shield to the phase conductors from direct lightning stroke

9) What is the value of charging current in short transmission lines?

  • A. More than long transmission lines
  • B. Equal to medium transmission lines
  • C. More than medium transmission lines
  • D. Less than medium transmission lines

10) What is the value of Inductive reactance in short transmission lines?

  • A. More at sending end
  • B. More at reciving end
  • C. More in middle of sending end and reciving end
  • D. Uniformly distributed over entire length

11) Voltage regulation of a transmission line should be ________

  • A. Minimum
  • B. Maximum
  • C. Less than 50 %
  • D. Greater than 50 %

12) What is the percentage voltage regulation of short transmission line if its sending end and reciving end voltages are 160 KV and 132 KV respectively?

  • A. 21.21 %
  • B. 12.12 %
  • C. 21.21 %
  • D. 30 %

13) Which among these is not a conventional source of electrical energy?

  • A. Coal
  • B. Wind
  • C. Gas
  • D. Gas

14) General output power from Wind energy ranges from——-

  • A. 10kW to 10MW
  • B. 20kW to 2MW
  • C. 30kW to 5MW
  • D. 20kW to 12MW

15) For a power system, the demand factor lies between: —

  • A. 4 to 1.0
  • B. 5 to 1.0
  • C. 2 to 0.5
  • D. 5 to 0.8

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