The hydraulic efficiency of a reaction turbine, is the ratio of

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

Correct Answer: Work-done on the wheel to the energy (or head of water) actually supplied to the turbine

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