Hydraulics and Fluid Mechanics in ME
For a body floating in a liquid the normal pressure exerted by the liquid acts at

bottom surface of the body
all points on the surface of the body
metacentre
e.g. of the body

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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
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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