Hydraulics and Fluid Mechanics in ME
Coefficient of contraction is the ratio of

Area of jet at vena-contracta to the area of orifice
Actual velocity of jet at vena contracta to the theoretical velocity
Loss of head in the orifice to the head of water available at the exit of the orifice
Loss of head in the orifice to the head of water available at the exit of the orifice

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Hydraulics and Fluid Mechanics in ME
When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure

Increases linearly as its radial distance
Increases as the square of the radial distance
Decreases as the square of the radial distance
Varies as the square of the radial distance

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