Discussion
Home ‣ Biochemical Engineering ‣ Downstream Processing Comments
- Question
A common filter medium is the cloth filter generally made of
Options- A. canvas
- B. synthetic fabrics
- C. metal or glass fiber
- D. all of these
- Correct Answer
- all of these
- 1. Chromatography is based on the
Options- A. different rate of movement of the solute in the column
- B. separation of one solute from other constituents by being captured on the adsorbent
- C. different rate of movement of the solvent in the column
- D. any of the above Discuss
- 2. In antibiotic manufacturing processes, the fermentation time ranges from
Options- A. 2-3 weeks
- B. 1-2 weeks
- C. 4-5 weeks
- D. 2-4 weeks Discuss
- 3. Which of the following can act as a shear protectorant?
Options- A. Serum
- B. Silicone oil
- C. Glucose
- D. Glutamic acid Discuss
- 4. 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
Options- A. 2500
- B. 100
- C. 12,50,000
- D. 1,000,000 Discuss
- 5. Which of the following describes the importance of the Kolmogorov eddy size in the biotechnology?
Options- A. The Kolmogorov eddy size is a measure of the smallest eddy size in a liquid
- B. 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
- C. At the Kolmogorov eddy size, much of the energy of the originating eddy will be released
- D. All of the above Discuss
- 6. Maintenance cost varies from
Options- A. 0-4% of the capital cost
- B. 12-16% of the capital cost
- C. 4-8% of the capital cost
- D. 8-12% of the capital cost Discuss
- 7. The stage wise operation of adsorption is called
Options- A. contact filtration
- B. conventional adsorption
- C. affinity adsorption
- D. ion exchange Discuss
- 8. The purity of a solute collected between two times t1 and t2 during chromatographic separation can be calculated as
Options- A. amount of solute eluted - amount of impurity eluted
- B. amount of solute eluted / amount of impurity eluted
- C. amount of solvent eluted + amount of impurity eluted
- D. amount of solvent eluted / amount of impurity eluted Discuss
- 9. Start up expenses in a fermentation industry varies from
Options- A. 0-5% of the capital cost
- B. 10-15% of the capital cost
- C. 5-10% of the capital cost
- D. 15-20% of the capital cost Discuss
- 10. Selectivity can be expressed as
Options- A. ratio of the distribution coefficients in different solute
- B. mass fraction of the solute in the extract phase at equilibrium
- C. mass fraction of the solute in the raffinate phase
- D. ratio of the mass fraction of the solute in the extract phase to the raffinate phase Discuss
Downstream Processing problems
Search Results
Correct Answer: different rate of movement of the solute in the column
Correct Answer: 4-5 weeks
Correct Answer: Serum
Correct Answer: 12,50,000
Correct Answer: All of the above
Correct Answer: 4-8% of the capital cost
Correct Answer: contact filtration
Correct Answer: amount of solute eluted / amount of impurity eluted
Correct Answer: 5-10% of the capital cost
Correct Answer: ratio of the distribution coefficients in different solute
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