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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The unit of surface tension is

N-m
N/m
N/m3
N/m2

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Hydraulics and Fluid Mechanics in ME
The property by virtue of which a liquid opposes relative motion between its different layers is called

Surface tension
Osmosis
Coefficient of viscosity
Viscosity

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Hydraulics and Fluid Mechanics in ME
The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)

wA/x
wA
wAx
wx

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Hydraulics and Fluid Mechanics in ME
Liquids

Occupy definite volume
Cannot be compressed
Are not affected by change in pressure and temperature
None of the listed here

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Hydraulics and Fluid Mechanics in ME
The hydraulic grade line is

always sloping downward in the direction of flow
always above the centre line of pipe
never above the energy grade line
All of these

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Hydraulics and Fluid Mechanics in ME
When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of

None of these
An ellipse
A triangle
A paraboloid

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