Fluid Mechanics
For water, when the pressure increases, the viscosity

Also increases
Decreases
First decreases, and then increases
Remains constant

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Fluid Mechanics
Select the wrong statement pertaining to flow of an incompressible fluid through a venturimeter.

Venturimeter occupies less space than an orificemeter
For frictionless flow, the fluid pressure entering the venturi meter will be exactly equal to that leaving the venturimeter
Discharge of fluid through a venturimeter depends upon the gage difference irrespective of the orientation of venturimeter
Venturimeter incurs less power loss compared to an equivalent orificemeter

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Fluid Mechanics
Shear stress in a fluid flowing in a round pipe

Remains constant over the cross-section
Is zero at the centre and varies linearly with the radius
Is zero at the wall and increases linearly to the centre
Varies parabolically across the cross-section

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