Power Systems
In a pressurized water reactor

 the coolant water boils in the reactor core.
 heavy water is used as both coolant and moderator.
 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 to spiliting of a heavy nucleus.
  the time required for one half of isotope to decay.
 the time required for full of atoms in a specimen disintegrate.
 none of above.

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Power Systems
Which of following statement are false

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

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