Power Systems
In a pressurized water reactor

 heavy water is used as both coolant and moderator.
 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.
  both B and C.

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Power Systems
Half life is defined as

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

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Power Systems
Which of following statement are false

 A thermal reactor needs a moderator material.
 In a nuclear reactor, multiplication factor is kept almost equal to one.
 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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