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An axial turbine stage consists of

  • A.A nozzle guide vane row followed by a rotor row
  • B.A rotor row followed by a nozzle row
  • C.Two rotor rows in series
  • D.An impeller and a diffuser

Answer: A

The stationary vanes accelerate the gas and turn it into the plane of rotation, and the rotor then extracts work from it. The order is the reverse of a compressor stage, where the moving row comes first and the stationary row follows to diffuse the flow.

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