Power Systems
Three generators rated 100 MVA, 11 kV have an impedance of 0.15 pu each. If in the same plant, these generators are being replaced by a single equivalent generator, the effective impedance of equivalent generator will be

 0.05 pu
 0.15 pu
 0.25 pu
 0.45 pu

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Power Systems
In Rankine cycle, the work output from a turbine is given by

  change in internal energy between inlet and outlet.
  change of enthalpy between inlet and outlet.
  change in temperature between inlet and outlet.
  change of entropy between inlet and outlet.

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