Hydraulics and Fluid Mechanics in ME
In open channels, the specific energy is the

Total energy measured above the horizontal datum
Total energy measured with respect to the datum passing through the bottom of the channel
Total energy per unit discharge
Kinetic energy plotted above the free surface of water

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

All of these
To store pressure energy which may be supplied to a machine later on
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

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