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

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

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Hydraulics and Fluid Mechanics in ME
Coefficient of velocity is defined as the ratio of

Actual velocity of jet at vena contracta to the theoretical velocity
None of these
Actual discharge through an orifice to the theoretical discharge
Area of jet at vena contracta to the area of orifice

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