Pick out the wrong statement.
A. The shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonion fluids is $$\frac{{\text{D}}}{{4{\text{L}}}} \cdot \Delta {\text{p}}$$
B. In the equation, $$\tau \cdot {{\text{g}}_{\text{c}}} = {\text{k}} \cdot {\left( {\frac{{{\text{du}}}}{{{\text{dy}}}}} \right)^{\text{n}}}$$ the value of the value of 'n' for pseudoplastic and dilatant fluids are < 1 and > 1 respectively.
C. Shear stress for Newtonion 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
Answer: Option D
This Question Belongs to Chemical Engineering >> Fluid Mechanics
A. Thermal conductivity
B. Electrical conductivity
C. Specific gravity
D. Electrical resistivity
A. $$\frac{{\text{V}}}{{{{\text{V}}_{\max }}}} = {\left( {\frac{{\text{x}}}{{\text{r}}}} \right)^{\frac{1}{7}}}$$
B. $$\frac{{\text{V}}}{{{{\text{V}}_{\max }}}} = {\left( {\frac{{\text{r}}}{{\text{x}}}} \right)^{\frac{1}{7}}}$$
C. $$\frac{{\text{V}}}{{{{\text{V}}_{\max }}}} = {\left( {{\text{x}} \times {\text{r}}} \right)^{\frac{1}{7}}}$$
D. None of these
A. d
B. $$\frac{1}{{\text{d}}}$$
C. $$\sigma $$
D. $$\frac{l}{\sigma }$$
A. $$\frac{{4\pi {\text{g}}}}{3}$$
B. $$\frac{{0.01\pi {\text{gH}}}}{4}$$
C. $$\frac{{0.01\pi {\text{gH}}}}{8}$$
D. $$\frac{{0.04\pi {\text{gH}}}}{3}$$
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