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Power Systems

Power Systems
The Y bus matrix of 100 bus interconnected system is 90% sparse. Hence the number of transmission lines in the system must be

 500
 450
 900
 250

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Power Systems
Which cooling is preferred for large turbine generator

  None of these.
  Oxygen cooling.
  Nitrogen cooling.
  Hydrogen cooling.

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Power Systems
In relay coil which is used?

  Instrument transformer.
  Current transformer.
  Potential transformer.
  Power transformer.

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Power Systems
For load flow studies, What are the quantities specified at load bus are

 P and Q
 δ and Q
 V and δ
 P and V

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Power Systems
Binary vapor cycle are used for

  increasing the turbine efficiency.
  improving the condenser performance.
All of these
  improving the plant efficiency.

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Power Systems
Mho relays are used for the protection of which of the following lines?

 long transmission lines only
 medium transmission lines only
None of these
 short transmission lines only

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