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

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

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Hydraulics and Fluid Mechanics in ME
The total energy of a liquid particle in motion is equal to

Pressure energy - (kinetic energy + potential energy)
Kinetic energy - (pressure energy + potential energy)
Potential energy - (pressure energy + kinetic energy
Pressure energy + kinetic energy + potential energy

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