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

Varies parabolically across the cross-section
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

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

## Fluid Mechanics Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the first fluid, the pressure drop will

Increase
Decrease
Remain unchanged
Data insufficient to predict relative pressure drop

24 mm/s
16 mm/s
12 mm/s
28 mm/s

## Fluid Mechanics A venturimeter can not be used for the direct measurement of

Datum difference in the stretch of pipeflow
Friction loss in pipe flow
Pressure difference in the flow throughpipeline
All of these