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Power Systems

Power Systems
Which of the following quantities are to be calculated for generator bus?

 Q and δ
 P and V
 P and Q
 δ and V

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Power Systems
On what factors does the selection of a water turbine depend

 Speed.
 Working head.
 Nature of load.
  All of above.

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Power Systems
What will be the thermal efficiency of a 240 V, 1000 W electric kettle if it brings 2 liters of water at 15° C to boiling point 15 Minutes

  79.33 %.
  74.56 %.
 78.96 %.
 80.25 %.

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Power Systems
Peak load power plants is/are

 both 1 and 2
 diesel plant
 nuclear plants
 pumped storage plant

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Power Systems
A 3 core cable gives on test a capacitance of 3.7 µF between two cores. Find the line charging current of the cable when it is connected to 11 kV, 50 Hz system?

 1 A.
  14.76 A.
 1.476 A.
 14.7 mA.

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Power Systems
To prevent maloperation of deferentially connected relay while energizing a transformer, the relay restraining coil is biased with

 3rd harmonic current.
 7th harmonic current.
 2nd harmonic current.
  5th harmonic current.

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