Hydraulics and Fluid Mechanics in ME
The overall efficiency of a reaction turbine is the ratio of

Work-done on the wheel to the energy (or head of water) actually supplied to the turbine
Power produced by the turbine to the energy actually supplied by the turbine
None of these
Actual work available at the turbine to the energy imparted to the wheel

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Hydraulics and Fluid Mechanics in ME
Manometric head, in case of a centrifugal pump, is equal to

All of these
Work-done per kN of water Losses within the impeller
Energy per kN at outlet of impeller Energy per kN at inlet of impeller
Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe

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