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Power Systems

Power Systems
Reflector nuclear reactor are made of

 steel.
 cast iron.
 boron.
  beryllium.

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Power Systems
Graphite is use din nuclear plant as a / an

  moderator.
 fuel.
 coolant.
 electrode.

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Power Systems
The equation of area control error(ACE) is

 ACE = ΔPtie + b.Δf
 ACE = ΔPtie - b.Δf
 ACE = ΔPtie +1/ b.Δf
 ACE = ΔPtie - 1/b.Δf

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Power Systems
The pu parameters for a 500 MVA machine on its own base are: Inertia, H = 20 pu; reactance X = 2 pu. The pu values of inertia and reactance on 100 MVA common base, respectively, are

 4, 10
 4, 0.4
 100, 10
 100, 0.4

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Power Systems
Which of the following statements is/are true? By increasing of temperature,

 sag increase
 both 1 and 2
 neither 1 nor 2
 tension decrease

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Power Systems
Under excited Synchronous phase modifier works as

 shunt capacitor
 series capacitor
 any of the above
 shunt reactor

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