Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by

dQ/Q = 3/2 × (dH/H)
dQ/Q = 3 × (dH/H)
dQ/Q = 5/2 × (dH/H)
dQ/Q = 2 × (dH/H)

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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 lift larger load by the application of a comparatively much smaller force
To increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure

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