Fluid Mechanics
The velocity profile exhibited by laminar flow of Newtonion fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an __________ with the apex at the centre line of the pipe.

Hyperbola
Semi-ellipse
Parabola
Semi-circle

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Fluid Mechanics
A differential pressure cell is used for

Measuring small pressure difference in liquids
Measuring the difference of the impact & the static pressure
Remote recording of pressure difference
Measuring small pressure difference in gases

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