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chemical engineering fluid mechanics
1. In case of laminar flow of fluid through a circular pipe, the
(A): average flow occurs at a radial distance of 0.5 r from the centre of the pipe (r = pipe radius).
(B): shear stress over the cross-section is proportional to the distance from the surface of the pipe.
(C): surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder.
(D): velocity profile varies hyperbolically and the shear stress remains constant over the cross-section.
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