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Power Systems

Power Systems
Specified quantities of slack bus are

 P and V
 V and δ
 P and δ
 P and Q

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Power Systems
The pickup value of relay is 6.5 Amp and fault current in relay coil is 39 Amp. Its plug setting multiplier is

 8 A.
 7 A.
 10 A.
  6 A.

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Power Systems
Recovery voltage in CB is equal to

  transient voltage.
  none of these.
  normal frequency 50 Hz rms voltage.
  arcing period voltage.

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Power Systems
A 25 MVA, 11 kV alternator is supplying full load at a point of 0.75 lagging. Determine the percentage increase in earning capacity when it is operated at improved power factor of 0.96 lagging.

  56 %.
  None of above
  28 %.
  14 %.

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Power Systems
For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes runners is

 Kaplan
 Francis
 Impeller
 Pelton

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Power Systems
In triangular configuration, inductance and capacitance values are ------ and ------ respectively

 higher, higher
 less, less
 less, higher
 higher, less

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