Hydraulics and Fluid Mechanics in ME
Overall efficiency of a centrifugal pump is the ratio of

Energy supplied to the pump to the energy available at the impeller
Energy available at the impeller to the energy supplied to the pump by the prime mover
Actual work-done by the pump to the energy supplied to the pump by the prime mover
Manometric head to the energy supplied by the impeller per kN of water

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Hydraulics and Fluid Mechanics in ME
The hydraulic efficiency of an impulse turbine is the

Ratio of the actual work available at the turbine to the energy imparted to the wheel
Ratio of the actual power produced by the turbine to the energy actually supplied by the turbine
None of these
Ratio of the work done on the wheel to the energy of the jet

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