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Chemical Engineering - Fluid Mechanics

Exercise : Fluid Mechanics - Section 2
6.
Choose the correct set of dimensions of viscosity that are equivalent (where, F, M, L, T are dimensions for force, mass, length and time respectively).
FL-2T, ML-1T-1
FLT, ML-1T-1
ML-1T-3, F-1L2T
F-1L2T-1, MLT-3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
The line of action of the buoyant force passes through the centre of gravity of the
submerged body.
displaced volume of the fluid.
volume of fluid vertically above the body.
horizontal projection of the body.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
Pick out the wrong statement.
The shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonion fluids is
In the equation, the value of 'n' for pseudoplastic and dilatant fluids are < 1 and >1 respectively.
Shear stress for Newtonion fluid is proportional to the rate of shear in the direction perpendicular to motion.
With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
The friction factor for turbulent flow in a hydraulically smooth pipe
depends only on Reynolds number.
does not depend on Reynolds number.
depends on the roughness.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and
moving
static
cold
hot
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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