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Chemical Engineering - Fluid Mechanics

Exercise : Fluid Mechanics - Section 4
16.
Which of the following is the most common pump for pumping either raw sewage or sludge ?
Electromagnetic pump
Centrifugal pump
Reciprocating pump
Gear pump
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Transition length for a turbulent fluid entering into a pipe is around __________ times the pipe diameter.
5
50
500
1000
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent 'n' is
1
0
< 1
> 1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have
very low speeds.
smaller discharge.
higher capital &maintenance cost.
high vibrations.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Which is the correct relationship for a centrifugal pump ? (where, D = Impeller diameter, inches H = Head developed, ft of liquid pumped N = Speed of pump, rpm)
D = 1840 H0.5/N
D = 1840 N/H0.5
H = 1840 D0.5/N
D = 1840 H/N
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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