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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
To avoid an interruption in the flow of a siphon, an air vessel is provided

At the summit
At the inlet
At any point between inlet and outlet
At the outlet

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Hydraulics and Fluid Mechanics in ME
The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.

Ax̅ / IG above
IG / Ax̅ above
IG / Ax̅ below
Ax̅ / IG below

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Hydraulics and Fluid Mechanics in ME
The angle of contact in case of a liquid depends upon

both of die above
the nature of the liquid and the solid
the material which exists above the free surface of the liquid
any one of the above

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

ρ ω2 r2
2ρ ω2 r2
ρ ω2 r2/4
ρ ω2 r2/2

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Hydraulics and Fluid Mechanics in ME
The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is (where R is radius of pipe)

0.577 R
0.423 R
0.223 R
0.707 R

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Hydraulics and Fluid Mechanics in ME
The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

Capillarity
Viscosity
Compressibility
Surface tension

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