Hydraulics and Fluid Mechanics in ME
In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.

None of these
Equal to
Less than
More than

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe or channel is said to be non-uniform when

The quantity of liquid flowing per second is constant
Each liquid particle has a definite path
The liquid particles at different sections have different velocities
The liquid particles at all sections have the same velocities

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