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

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

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Hydraulics and Fluid Mechanics in ME
Slip of a reciprocating pump is defined as the

Sum of actual discharge and the theoretical discharge
Ratio of actual discharge to the theoretical discharge
Product of theoretical discharge and the actual discharge
Difference of theoretical discharge and the actual discharge

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