Pick out the wrong statement. (A) The shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonian fluids is (D/4L). ∆p (B) In the equation, T. gc = k. (du/dy) n the value of 'n' for pseudoplastic and Dilatant fluid are < 1 and >1 respectively (C) Shear stress for Newtonian fluid is proportional to the rate of shear in the direction perpendicular to motion (D) With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids

Pick out the wrong statement.
(A) The shear stress at the pipe (dia = D, length = L) wall in case of laminar
flow of Newtonian fluids is (D/4L). ∆p
(B) In the equation, T. gc = k. (du/dy)
n
the value of 'n' for pseudoplastic and
Dilatant fluid are < 1 and >1 respectively
(C) Shear stress for Newtonian fluid is proportional to the rate of shear in the
direction perpendicular to motion
(D) With increase in the Mach number >0.6, the drag co-efficient decreases
in case of compressible fluids
by

1 Answer

Answer :

(D) With increase in the Mach number >0.6, the drag co-efficient decreases
in case of compressible fluids
by

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Description : In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity) (A) Vavg (B) 1.2 Vavg (C) 1.5 Vavg (D) 1.8 Vavg

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