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- Question
The collection efficiency by interception increases with the
Options- A. increasing particle diameter
- B. increasing air flow velocity
- C. both (a) and (b)
- D. increasing particle size
- Correct Answer
- increasing particle size
- 1. The height to diameter ratio (H/D) for the tank fermenters is
Options- A. <3
- B. >3
- C. <1.5
- D. >1.5 Discuss
- 2. ?-amylase is
Options- A. endoenzyme
- B. exoenzyme
- C. saccharifying enzyme
- D. both (b) and (c) Discuss
- 3. The overall del factor (?) may be represented as
Options- A. ?overall = ?heating + ?holding- ?cooling
- B. ?overall = ?heating + ?holding+ ?cooling
- C. ?overall = ?heating - ?holding+ ?cooling
- D. ?overall = ?heating - ?holding- ?cooling Discuss
- 4. Which of the following is not considered among the three best-known theories of interphase mass transfer?
Options- A. two-film theory
- B. penetration theory
- C. surface renewal theory
- D. Calderbank and Moo-Young theory Discuss
- 5. According to BIS the maximum permissible limit of dissolved solids in drinking water is
Options- A. 1000 mg/l
- B. 500 mg/l
- C. 2000 mg/l
- D. 1500 mg/l Discuss
- 6. The reciprocal equation for non competitive inhibition can be arranged to the equation for the
Options- A. Dixon plot
- B. Woolf-Augusteinsson-Hofstee plot
- C. Eadie-Scatchard plot
- D. Hanes-Woolf plot Discuss
- 7. Filamentous fungal cells are more shear sensitive than bacterial cells because of
Options- A. the presence of citin in cell walls of filamentous fungi
- B. larger in size than bacterial cells and therefore are more susceptible to shear forces
- C. fungal cells are much larger than bacterial cells
- D. all of the above Discuss
- 8. Reynolds number for turbulent flow over a plate should be more than
Options- A. 5 x 10-5
- B. 106
- C. 5 x 105
- D. 500 Discuss
- 9. Which of the following impellers generate a flow parallel to the axis of shaft?
Options- A. Axial flow
- B. Radial flow
- C. Both (a)and(b)
- D. None of these Discuss
- 10. Pure oxygen, if used instead of air will increase oxygen transfer rates because
Options- A. the saturation concentration of oxygen is higher
- B. the bubble size is smaller
- C. the oxygen transfer coefficient is larger
- D. the partial pressure of oxygen in the gas phase is lower Discuss
More questions
Correct Answer: <3
Correct Answer: both (b) and (c)
Correct Answer: ?overall = ?heating + ?holding+ ?cooling
Correct Answer: Calderbank and Moo-Young theory
Correct Answer: 2000 mg/l
Correct Answer: Dixon plot
Correct Answer: all of the above
Correct Answer: 106
Correct Answer: Axial flow
Correct Answer: the saturation concentration of oxygen is higher
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