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

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

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

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