Power Systems
In a pressurized water reactor

 heavy water is used as both coolant and moderator.
  both B and C.
 the coolant water boils in the reactor core.
 water is used at high pressure so that it is available is liquid from at about 280° C.

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Power Systems
Half life is defined as

 the time required to spiliting of a heavy nucleus.
 the time required for full of atoms in a specimen disintegrate.
 none of above.
  the time required for one half of isotope to decay.

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Power Systems
Which of following statement are false

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

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