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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The density of water is 1000 kg/m3 at

4°C
0°C
0°K
20°C

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

0.95
0.86
0.611
1.01

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Hydraulics & Fluid Mechanics
The peoperty by virtue of which a liquid opposes relative motion between its different layers is called

surface tension
viscosity
co-efficient of viscosity
osmosis

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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
maximum
negative value
minimum

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

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

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Hydraulics & Fluid Mechanics
A perfect gas

has constant viscosity
None of these
is incompressible
is of theoretical interest

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