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Power Systems

Power Systems
At slack bus, which one of the following combinations of variables is not specified?

 P and Q
 Q and V
 V and δ
 P and V

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Power Systems
Efficiency of thermal power plant can be taken as

  turbine efficiency.
  generator efficiency.
  efficiency of thermal cycle.
  product of efficiencies of all stages.

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Power Systems
Mho relay is used for protection of

  long lines.
  medium lines.
  none of these.
  short lines.

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

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

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Power Systems
Radio interference occur in telecommunication line due to

 electro magnetic induction
 both 1 and 2
 electro static induction
 nether 1 nor 2

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Power Systems
For harnessing low variable water heads, the suitable hydraulic turbine with high percentage of reaction and runner adjust vanes is

  Kaplan.
  Impeller.
  Francis.
  Pelton.

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