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

None of these
Power produced by the turbine to the energy actually supplied by the turbine
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

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Hydraulics and Fluid Mechanics in ME
Surface tension

Acts in the plane of the interface normal to any line in the surface
Decreases with fall in temperature
Is a function of the curvature of the interface
Is also known as capillarity

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