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Power Systems

Power Systems
In thermal plant most of the energy is wasted in

 turbines
 ESP
 boiler
 condenser

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Power Systems
Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency?

 50%
 86%%
 75%
 90%

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Power Systems
In which of the following transmission lines capacitance effect is negligible?

 long transmission lines
 medium transmission lines
 shoart transmission lines
 both 1 and 3

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Power Systems
The amount of ash content in Indian coal

 20 %.
  60 %.
  45 %.
 35 %.

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Power Systems
Pin insulators are used up to

 11 kV
 33 kV
 120 kV
 any voltage level

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Power Systems
The presence of earth in case of overhead lines

 decrease inducatance
 increase capacitance
 increase inductance
 decrease capacitance

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