Power Systems
Which of following statement are false

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

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Power Systems
The advantage of hydro electric power station over thermal power station is

 the initial cost of hydro electric power station is low
 the operation cost of hydro electric power station is low
 hydro electric power station can supply the power throughout the year
 hydro electric station can be constructed at the place where the energy is required

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