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Hydraulics and Fluid Mechanics in ME

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
0.707 R
0.223 R

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Hydraulics and Fluid Mechanics in ME
Dynamic viscosity of most of the liquids with rise in temperature

Increases
Unpredictable
Decreases
Remain unaffected

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Hydraulics and Fluid Mechanics in ME
A liquid would wet the solid, if adhesion forces as compared to cohesion forces are

equal
more
less at low temperature and more at high temperature
less

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Hydraulics and Fluid Mechanics in ME
Hot wire anemometer is used to measure

Gas velocities
Pressure in liquids
Pressure in gases
Liquid discharge

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Hydraulics and Fluid Mechanics in ME
According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.

Equal to
Directly proportional
None of these
Inversely proportional

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Hydraulics and Fluid Mechanics in ME
The pressure at the summit of a syphon is

more than atmospheric
None of these
equal to atmospheric
less than atmospheric

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