Power Systems
The function of a surge tank is to

 supply water at constant pressure.
 produce surge in the pipeline.
 none of above.
  relieve water hammer pressure in the penstock.

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Power Systems
Gas coolled reactor

 use heavy water as coolant as well as moderator.
 use coolant at pressure of 14-28 Kg/cm2 and at temperature of 700°-800° c.
  both B and C.
 use CO2. or helium as coolant and graphite the moderator.

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