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

Actual work available at the turbine to energy imparted to the wheel
None of these
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

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Hydraulics and Fluid Mechanics in ME
A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is

one-half its value when cylinder was full
zero
cannot be predicted from the given data
one-fourth its value when cylinder was full

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