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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The eddy viscosity for turbulent flow is

a physical property of the fluid.
a function of temperature only
dependent on the flow
independent of the flow

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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.

Directly proportional
Inversely proportional
None of these
Equal to

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Hydraulics and Fluid Mechanics in ME
The optimum value of vane exit angle for a centrifugal pump impeller is

20-25°
50-60°
10-15°
30-40°

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Hydraulics and Fluid Mechanics in ME
The hydraulic mean depth or the hydraulic radius is the ratio of

Area of flow and wetted perimeter
Velocity of flow and area of flow
None of these
Wetted perimeter and diameter of pipe

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Hydraulics and Fluid Mechanics in ME
For manometer, a better liquid combination is one having

higher surface tension
high density and viscosity
surface tension is no criterion
lower surface tension

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Hydraulics and Fluid Mechanics in ME
With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on

a sphere
a cylinder
a streamlined body
a circular disc of plate held normal to flow

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