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Power Systems

Power Systems
Which turbine is ideally suited to pumped storage plants

 Pelton.
 Impeller.
  Kaplan.
 Francis.

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Power Systems
String efficiency depends upon

  all of these.
 voltage rating of one SCR.
 voltage rating of whole string.
 no. of SCR in the string.

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Power Systems
A synchronous generator is of 100 MVA have inertia constant of 20 MJ/MVA. Find the angular momentum in MJsec/electrical degrees

 0.4
 5
 2000
 0.22

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Power Systems
Peterson coil is used in case of transmission line for

 improve power factor
 compensation of arcing grounds
 increase the voltage level
 reduce ferranti effect

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Power Systems
A generator has a rating of 10 MVA, 5 kV has a reactance of 0.02 pu. Find the reactance at a new base values of 50 MVA, 10 kV?

 0.05
 0.02
 0.25
 0.025

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Power Systems
The value of diversity factor is

 less than 1
 1
 0
 greater than 1

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