Power Systems
A sodium graphite reactors use

 a mixture of sodium and graphite as coolant.
  sodium as coolant and graphite as moderator.
 a mixture of sodium and graphite as moderator.
 sodium as moderator and graphite as coolant.

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Power Systems
Which of the following statements is true? Corona loss increases with

 decrease in conductor size and decrease in supply frequency
 increase in conductor size and decrease in supply frequency
 increase in conductor size and increase in supply frequency
 decrease in conductor size and increase in supply frequency

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