Hydraulics and Fluid Mechanics in ME
A manometer is used to measure

Atmospheric pressure
Difference of pressures between two points in a pipe
Pressure in Venturimeter
Pressure in pipes and channels

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

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

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