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Power Systems

Power Systems
In which of the following given faults, all the sequence currents are equal?

 LG
 LLG
 LLL
 LL

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Power Systems
Which material is used in controlling chain reaction in a nuclear reactor

 Beryllium.
  Boron.
 Heavy water.
 Thorium.

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Power Systems
The flow duration curve at a given head of a hydroelectric plant is used to determine

 load factory at the plant.
 diversity factor for the plant.
  total power available at the site.
 total units of energy available.

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Power Systems
In a 3-phase transmission line, each phase is supported by 3 insulated discs, maximum voltage of each disc is 20 kV. Find the operating voltage of the transmission line per phase if efficiency of string is 80.6%.

 48.36 kV
 83.76 kV
 52.84 kV
 20 kV

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Power Systems
A hydroelectric power station is commonly found in

  hilly areas.
 grasslands.
 swamps.
 desert areas.

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Power Systems
When a pumped storage power plant is operated in conjunction with a steam power plant

 the operating cost of the steam plant become optimum
 chances of the tripping of the system decrease
 load factor of the steam plant is increased
All of these

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