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Chemical Engineering - Fluid Mechanics

Exercise : Fluid Mechanics - Section 1
11.
With increasing flow rate, the hydraulic efficiency of a centrifugal pump
monotonically decreases.
decreases and then increases.
remains constant.
increases and then decreases.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
The velocity profile for turbulent flow through a closed conduit is
logarithmic
parabolic
hyperbolic
linear
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of
relative roughness.
absolute roughness.
friction co-efficient for flows at equal Reynold number.
all (a), (b) & (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Water hammer in a pipeline results from the
bursting of pipelines due to closure by a valve.
rapid pressure change due to a rapid change in the rate of flow.
pressure increase due to closure of a valve resulting in decrease in rate of flow.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Molten soap mass is transported by a __________ pump.
diaphragm
reciprocating
gear
centrifugal
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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