Power Systems
The specific speed ( NS ) of turbine is given by

 none of these.
 N√( P ) / H2/3.
  N√( P ) / H1.25.
 P√( N ) / H3/2.

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Power Systems
An impulse turbine

 always operates submerged.
 makes use of a draft tube.
  operates by initial complete conversion to kinetic energy.
 is most suited for low head and high discharge power plants.

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