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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
THE THEORETICAL VALUE OF COEFFICIENT OF CONTRACTION OF A SHARP EDGED ORIFICE IS

0.611
0.86
1.01
0.95

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Hydraulics & Fluid Mechanics
At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

could be any value
minimum
maximum
negative value

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Hydraulics & Fluid Mechanics
A fluid is said to be ideal, if it is

inviscous and incompressible
incompressible
inviscous and compressible
inviscous

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Hydraulics & Fluid Mechanics
THEE HORIZONTAL COMPONENT OF BUOYANT FORCE IS

NEGLIGIBLE
ZERO
None of these
SAME AS BUOYANT FORCE

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Hydraulics & Fluid Mechanics
The surface tension of mercury at normal temperature compared to that of water is

same
more
more or less depending on size of glass tube
less

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Hydraulics & Fluid Mechanics
In which of the following the friction drag is generally larger than pressure drag?

an airfoil
a circular disc or plate held normal to flow
a sphere
a cylinder

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