Power Systems
The insulation of the modern EHV lines is designed based on

 the lighting voltage.
  the switch voltage.
 R × I.
 corona.

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Power Systems
In a pressurized water reactor

 the coolant water boils in the reactor core.
 heavy water is used as both coolant and moderator.
  both B and C.
 water is used at high pressure so that it is available is liquid from at about 280° C.

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