Power Systems
The commercial sources of energy are

 none of above.
 wood, animal wastes and agricultural wastes.
 solar, wind, biomass.
  fossile fuels and radioactive substances.

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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.
  Nuclear power plants are used as peak load plants only.
 In a nuclear reactor, multiplication factor is kept almost equal to one.

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