Fluid Mechanics
The Prandtl mixing length is

Useful for computing laminar flow problems
Independent of radial distance from the pipe axis
Zero at the pipe wall and is a universal constant
Independent of the shear stress

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

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

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