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Power Systems

Power Systems
A string type insulator has three units with self capacitance C and ground capacitance of 0.2 C having a string efficiency of

 78%
 82%
 80%
 76%

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Power Systems
Which of the following are the fissile materials

  None of these.
 U235, U233 and Pu239.
 U235 and Th239.
 U238 and Th232.

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Power Systems
Asynchronous tie line is a

None of these
 DC transmission line
 either 1 or 2
 AC transmission line

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Power Systems
Which of following power plants is free from environmental problem

 Nuclear.
  Hydroelectric.
 Steam.
 Diesel engine.

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Power Systems
Corona loss is ----------------- on hilly areas than as plain areas.

 more
 less
None of these
 remain same

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Power Systems
Pin insulators are used up to

 33 kV
 11 kV
 any voltage level
 120 kV

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