Hydraulics and Fluid Mechanics in ME
Discharge of a centrifugal pump is

Inversely proportional to diameter of its impeller
Directly proportional to (diameter)² of its impeller
Inversely proportional to (diameter)² of its impeller
Directly proportional to diameter of its impeller

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

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

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