Power Systems
Where is the draft tube of a hydroelectric plant that is an airtight pipe located

 In between the runner exhaust and the tail race.
 At the beginning of the penstock.
 Near the surge tank.
  In between the penstock and runner.

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

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

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