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Power Systems

Power Systems
Buchholz relay is used for protection of

  bus bar.
  alternator.
  transformer.
  none of these.

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Power Systems
The function of a surge tank is to

 none of above.
 supply water at constant pressure.
  relieve water hammer pressure in the penstock.
 produce surge in the pipeline.

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Power Systems
A 200 MW capacity generator has a speed regulation of 4% for a frequency drop of 0.05 Hz. Find the power input supplied by the turbine for maintaining constant frequency?

 15 MW
 10 MW
 5 MW
 20 MW

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Power Systems
A penstock is used as a condition between

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

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Power Systems
What is the function of economiser in steam boilers

 improving thermal efficiency
All of these
 collect ash particals
 cooling

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Power Systems
Operator "a" rotates a vector

 anti clock wise direction
 nether 1 nor 2
 clock wise direction
 either 1 or 2

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