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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
 0.25 pu
 0.2 pu
 0.1 pu

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Power Systems
String efficiency depends upon

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

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Power Systems
A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the transmitted voltage?

 36. 36 kV
 30.6 Kv
 18.18 kV
 100 kV

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Power Systems
For variable heads of near about but less than 30 m, which type of turbines is used hydro power plant

  Kaplan.
 Francis.
 None of above.
 Pelton.

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Power Systems
Lightning arresters are used for

All of these
 protection of equipment from open circuits
 protection of equipment from short circuits
 protection of equipment from external lightning

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Power Systems
A moderator material should have

None of these
 may be any of the above.
  small atomic mass.
 large atomic mass.

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