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Power Systems

Power Systems
The angular moment of 10 MVA generator is 0.2. Find the new value of angular moment for 20 MVA base?

 0.4 pu
 0.1 pu
 0.25 pu
 0.2 pu

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Power Systems
A 10 MVA generator has reactance of 0.2 pu. Find the new reactance value for 50 MVA base?

 1 pu
 5 pu
 0.25 pu
 0.2 pu

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Power Systems
The insulation of modern EHV is designed based on

  switching voltage.
 lightning voltage.
 corona.
 RI.

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Power Systems
Which of the following power stations is mainly used to cover peak load on the system?

 gas based thermal power plant
 nuclear plant
 coal based thermal power plant
 pumped storage hydro power plant

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Power Systems
A buchholz relay is used for

 protection of a transformer against all external faults
 both 1 and 2
 protection of a transformer against all internal faults
 nether 1 nor 2

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Power Systems
Which of the following represents the transmission line positive sequence reactance

 Xs +2 Xm
 Xs - Xm
 Xm - Xs
 2Xs + Xm

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