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Power Systems

Power Systems
Buchholz relay is used for protection of

  none of these.
  alternator.
  bus bar.
  transformer.

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Power Systems
Load frequency control is achieved by properly matching the individual machines

  turbine inputs.
  generator ratings.
  reactive powers.
  generated voltages.

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Power Systems
To protect the power transformer ( Y-Y with neutral grounded) against fault, which type of connection do the current transformers have?

 Δ-Y connection
 Δ-Δ connection
 Y-Δ connection
 Y-Y connection

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Power Systems
Which of following generating plants has the minimum operating cost

 Steam plant.
 Nuclear plant.
 Hydroelectric plant.
 Diesel plant.

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Power Systems
The sequence components of the fault current are as follows: IR1 = j1.5 pu, IR2 = -j0.5 pu, IR0 = -j1. The type of fault is

 LLG
 LL
 LLL
 LG

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Power Systems
Highest pressure generating pump inside the thermal plant is

 boiler feed pump
 high pressure heater
All of these
 low pressure heater

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