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Power Systems

Power Systems
Rankine cycle efficiency of a steam power plant is of

  20 - 30 %.
  60 - 80 %.
  45 - 80 %.
  30 - 45 %.

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Power Systems
The per unit impedance Z(pu) is given by

 ZΩ* (MVA)b/(KV)²b
 ZΩ* (MVA)b*100/(KV)²b
 ZΩ* (MVA)b/((KV)²b *100)
 ZΩ* (kVA)b/(KV)²b

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Power Systems
In a thermal power plant, which of its following components needs maximum maintenance attention

 Super heater.
 Boiler.
 Steam turbine.
 Condenser.

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Power Systems
India’s largest thermal power station is located at

 Neyveli.
 Kota.
 Chandrapur.
 Sarni.

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Power Systems
Asynchronous tie line is a

 DC transmission line
 either 1 or 2
None of these
 AC transmission line

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Power Systems
The unit protection scheme provides

 simultaneous protection.
 back up protection.
  primary protection.
 remote protection.

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