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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
independent of the flow
dependent on the flow

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Hydraulics and Fluid Mechanics in ME
The flow ratio in case of Francis turbine varies from

0.6 to 0.9
0.4 to 0.5
1 to 1.5
0.15 to 0.3

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Hydraulics and Fluid Mechanics in ME
The ratio of absolute viscosity to mass density is known as

specific viscosity
coefficient of viscosity
kinematic viscosity
viscosity index

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Hydraulics and Fluid Mechanics in ME
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

Zero
Minimum
Maximum
Could be any value

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Hydraulics and Fluid Mechanics in ME
Cavitation is caused by

low pressure
high velocity
weak material
high pressure

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Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of the fluid on an immersed body is called

upthrust
buoyancy
all the above are correct
center of pressure

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