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Chemical Engineering - Fluid Mechanics

Exercise : Fluid Mechanics - Section 1
46.
For a particle settling in water at its terminal settling velocity, which of the following is true ?
Buoyancy = weight + drag
Weight = buoyancy + drag
Drag = buoyancy + weight
Drag = weight
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is
10 KPa
20 KPa
30 KPa
40 KPa
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
Pick out the correct statement.
A forced vortex occurs when fluid rotates as a solid about an axis.
In laminar flow, Newton's law of viscosity does not apply.
A free vortex occurs, when fluidrotates as a solid.
In turbulent flow, there are neither cross-currents nor eddies.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
Shear stress in a fluid flowing in a round pipe
varies parabolically across the cross-section.
remains constant over the cross-section.
is zero at the centre and varies linearly with the radius.
is zero at the wall and increases linearly to the centre.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
The resistance wire used in a hot wire anemometer for conducting electrical current is made of
copper
tungsten
chromium
aluminium
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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