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Power Systems

Power Systems
If the fault current is 2000 A, the relay setting is 50% and CT ratio is 400 : 5, then plug setting multiplier will be

 25.
 10.
 15.
 50.

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Power Systems
A generating station has a maximum demand of 100 MW, a load factor of 60% and a plant capacity factor of 50%. The reserve capacity of the plant is

 15 MW
 20 MW
 10 MW
 80 MW

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Power Systems
In a steam power plant, the feed water coming to the economizer is heated plant the feed water coming to the economizer is heated using

 HP steam.
 LP steam.
 direct heat in the furnace.
  flue gas.

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Power Systems
Rankine cycle efficiency of a steam power plant is of

  20 - 30 %.
  60 - 80 %.
  45 - 80 %.
  30 - 45 %.

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Power Systems
A hydro electric generating station is supplied from a reservoir of capacity 5 × 10 − 6 cubic meters at a head of 200 meters. Find the total energy available in KWh if the overall efficiency is 75 %

 4.06 × 106 kWh.
 3 × 106 kWh.
  2.044 × 106 kWh.
 5 × 106 kWh.

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Power Systems
Zero sequence currents can flow from a line into a transformer bank if the windings are in

 delta / delta.
  ground star / delta.
 delta / star.
 star / grounded star.

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