Power Systems
The pu parameters for a 500 MVA machine on its own base are: Inertia, H = 20 pu; reactance X = 2 pu. The pu values of inertia and reactance on 100 MVA common base, respectively, are

 4, 10
 4, 0.4
 100, 10
 100, 0.4

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Power Systems
Which of following statement are false

 In a nuclear reactor, multiplication factor is kept almost equal to one.
 A thermal reactor needs a moderator material.
 In nuclear power plants, chain reaction is controlled by cadmium rods.
  Nuclear power plants are used as peak load plants only.

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