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- Question
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
- Correct Answer
- 12,50,000
- 1. Which category of enzymes belongs to class two in the international classification?
Options- A. Hydrolases
- B. Ligases
- C. Transferases
- D. Isomerase Discuss
- 2. Which of these proteases is not a cysteine active site protease?
Options- A. Calpain
- B. Cathepsin D
- C. Papain
- D. None of the above Discuss
- 3. Enzymes are basically
Options- A. proteins
- B. vitamins
- C. fat
- D. carbohydrates Discuss
- 4. Two continuous bioreactors containing the same organisms, fed with the same feed at the same dilution rate were compared. Reactor 1 started with an initial concentration of glucose of 10 g.l-1, while reactor 2 contained 0.1 g.l-1 of glucose at the start of the process then at steady state
Options- A. the concentration of glucose in reactor 1 would be greater than that in reactor 2
- B. the concentration of glucose in reactor 1 would be equal to reactor 2
- C. the concentration of glucose in reactor 1 would always be zero.
- D. the concentration of glucose in reactor 1 would be less than that in reactor 2 Discuss
- 5. Non-linear relationship between shear stress and shear rate exists in
Options- A. newtonian fluids
- B. non-newtonian fluids
- C. both (a) and (b)
- D. none of these Discuss
- 6. Which of the following impellers will provide radial flow?
Options- A. Paddles
- B. Flat blade turbines
- C. Disk flat blade turbines
- D. All of the above Discuss
- 7. 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
- 8. Secondary treatment uses __________ to consume wastes.
Options- A. micro-organisms
- B. chemicals
- C. filtration
- D. none of these Discuss
- 9. At 25°C, the saturation concentration of oxygen in water is 1.26 mmol/l and the partial pressure of oxygen is 1 atm. The Henry's law constant will be
Options- A. 0.793atml/mmol
- B. 0.207atml/mmol
- C. 1.26 atml/mmol
- D. 8.74 atml/mmol Discuss
- 10. Sterilization can be carried out by
Options- A. heat
- B. radiation
- C. chemical agents
- D. all of these Discuss
More questions
Correct Answer: Transferases
Correct Answer: Cathepsin D
Correct Answer: proteins
Correct Answer: the concentration of glucose in reactor 1 would be equal to reactor 2
Correct Answer: non-newtonian fluids
Correct Answer: All of the above
Correct Answer: 4-5 weeks
Correct Answer: micro-organisms
Correct Answer: 0.793atml/mmol
Correct Answer: all of these
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