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Power Systems

Power Systems
Which of the following plants is/are base load plants

 pump storage
 nuclear
 both 1 and 2
 run off river

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

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

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Power Systems
In a thermal power plants, pressure in the working fluid cycle is developed by

 superheater.
 turbine.
  feed water pump.
 condenser.

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Power Systems
A generator has a rating of 10 MVA, 5 kV has a reactance of 0.02 pu. Find the reactance at a new base values of 50 MVA, 10 kV?

 0.025
 0.05
 0.02
 0.25

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Power Systems
Characteristics of arc quenching medium is/are

All of these
 High thermal conductivity
 Non flammable
 High dielectric strength

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Power Systems
Condition for maximum voltage regulation

 tanφ = R/X
 cosφ = X/R
 tanφ = X/R
 cosφ = R/X

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