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Power Systems

Power Systems
Buchholz relay is used for protection of

  transformer.
  alternator.
  bus bar.
  none of these.

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Power Systems
Which type of connection is employed for current transformers for the protection of star- delta connected 3-phase transformer?

 star-star
 delta-star
 delta-delta
 star-delta

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Power Systems
A penstock is used as a condition between

 the turbine and discharge drain.
 none of above.
 the heat ex-changer and the turbine in nuclear power plant.
  the dam and the turbine in a hydro station.

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Power Systems
Which of the following is/are the methods of improving transient stability?

 Fast acting governing system
 Dynamic breaking
 Fast acting excitation control
All of these

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Power Systems
In a long transmission line, if we increase the length of the line, the parameters A and B respectively

 increases and increases
 decreases and decreases
 decreases and increases
 increases and decreases

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Power Systems
If R = 84 ohm/Km, G = 10-6 mho/Km, H = 0.01 H/Km, C = 0.061 μ F/Km and frequency = 1000 Hz, then what is the value of propagation constant of the transmission line

 None of them.
 0.018 per Km.
 0.09 + j 0.018 per Km.
 0.01 + j 0.02 per Km.

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