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Biochemical Engineering - Fluid Flow

Exercise : Fluid Flow - Section 1
  • Fluid Flow - Section 1
36.
A stirred tank reactor containing a fluid with a density of 2.5 g.ml-1 and viscosity of 0.002 kg m-1s-1 is mixed at 120 rpm. If the fluid is mixed with an impeller having diameter 50 cm, then the Reynolds number of the liquid in the reactor is
2500
100
12,50,000
1,000,000
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
If the viscosity of a fluid decreases with the length of time that it is being mixed, then this fluid is
newtonian
rheopectic
viscoelastic
thixotropic
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Which of the following describes the importance of the Kolmogorov eddy size in the biotechnology?
The Kolmogorov eddy size is a measure of the smallest eddy size in a liquid
When the Kolmogorov eddy size become equivalent or smaller than the cell or particle diameter, then the cell or particle will become susceptible to shear damage
At the Kolmogorov eddy size, much of the energy of the originating eddy will be released
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
A thixotropic fluid is one in which the viscosity
is constant regardless of the stirrer speed or mixing time
changes during mixing but returns to its original state after mixing
increases with mixing time
decreases with mixing time
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
Newtonian fluid is one in which the viscosity
remains constant with time and power input
increases with the level of power input
decreases with the level of power input
drastically increases with the level of power input
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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