Power Systems
In a pressurized water reactor

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

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Power Systems
An impulse turbine

  operates by initial complete conversion to kinetic energy.
 always operates submerged.
 makes use of a draft tube.
 is most suited for low head and high discharge power plants.

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Power Systems
Which of the following statement is/are true?Zn

 nether 1 nor 2
 The neutral grounding impedance Zn appears as Zn in zero sequence equivalent circuit
 The neutral grounding impedance Zn appears as 3Zn in zero sequence equivalent circuit
 both 1 and 2

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