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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The normal stress in a fluid will be constant in all directions at a point only if

It is incompressible
It has zero viscosity
It has uniform viscosity
It is at rest

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Hydraulics and Fluid Mechanics in ME
The unit of dynamic viscosity in S.I. units is

Poise
N-s/m²
Stoke
N-m/s²

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is generally used to pump highly viscous fluid?

Air lift pump
Centrifugal pump
Screw pump
Reciprocating pump

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Hydraulics and Fluid Mechanics in ME
In a static fluid

Linear deformation is small
Resistance to shear stress is small
Only normal stresses can exist
Fluid pressure is zero

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Hydraulics and Fluid Mechanics in ME
Choose the correct relationship

dynamicviscosity = kinematicviscosity x density
specific gravity = gravity x density
gravity = specific gravity x density
kinematicviscosity = dynamicviscosity x density

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Hydraulics and Fluid Mechanics in ME
When the velocity distribution is uniform over the cross-section, the correction factor for momentum is

1
43924
2

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