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

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

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Hydraulics and Fluid Mechanics in ME
A hydraulic press is a device used

All of these
To increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure
To lift larger load by the application of a comparatively much smaller force
To store pressure energy which may be supplied to a machine later on

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