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Chemical Engineering - Fluid Mechanics

Exercise : Fluid Mechanics - Section 10
16.
When a fluid flows over a solid surface, the
velocity is uniform at any cross-section.
velocity gradient is zero at the solid surface.
resistance between the surface & the fluid is lesser as compared to that between the fluid layers themselves.
velocity is not zero at the solid surface.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Pick out the wrong statement about cavitation.
Sudden reduction of pressure in a fluid flow system caused by flow separation, vortex formation or abrupt closing of valve leads to cavitation.
Cavitation may be caused due to boiling of liquid by decreasing the pressure resulting in formation & collapse of vapor cavities.
Cavitation begins at higher static pressure and lower velocity in larger diameter pipelines resulting in audible noise.
Large scale cavitation can not damage pipeline, restrict fluid flow and damage steam turbine blades.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
The maximum delivery pressure of a reciprocating compressor may be about __________ kg/cm2.
1000
2000
3000
4000
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
The velocity for subsonic flow in a pipeline
increases in the downstream direction.
is constant.
decreases in the downstream direction.
is independent of the area of flow.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Permanent pressure loss in a well designed venturimeter is about __________ percent of the venturi differential.
1
10
30
50
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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