Power Systems
Efficiency of thermal power plant can be taken as

  efficiency of thermal cycle.
  product of efficiencies of all stages.
  turbine efficiency.
  generator efficiency.

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

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

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