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Power Systems

Power Systems
A 3-phase breaker is rated at 2000 MVA, 33 kV, its making current will be

  35 kVA.
 49 kVA.
  89.22 kVA.
 70 kVA.

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Power Systems
A 200 MW capacity generator has a speed regulation of 4% for a frequency drop of 0.05 Hz. Find the power input supplied by the turbine for maintaining constant frequency?

 10 MW
 20 MW
 15 MW
 5 MW

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Power Systems
If the percentage reactance of an element is 20 % and the full load current is 50 Amp, the short circuit current will be

 350 Amp.
  250 Amp.
 300 Amp.
 200 Amp.

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Power Systems
Electrostatic precipitators in thermal power plants are used for

 removal of ash from flue gas
 control flow rate
All of these
 remove moisture from the cole

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Power Systems
The maximum efficiency of modern coal fired steam steam raising thermal power plants is restricted to about 0.35( a low value), mainly because of

 high energy loss in boilers
 low alternator efficiency
 low steam turbine mechanical efficiency
 high energy loss in condenser

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Power Systems
In kaplan runner, the number of blades is generally of the order of

  3 - 6.
 1 - 2.
  16 - 24.
 12 - 16.

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