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- Question
Axial flow impellers
Options- A. provide high shear conditions for breaking up bubbles
- B. provide low shear conditions and are suited for use in shear sensitive procesess
- C. provide direct flow towards the walls of the reactor
- D. none of the above
- Correct Answer
- provide low shear conditions and are suited for use in shear sensitive procesess
- 1. Surface renewal theory predicts that the mass transfer coefficient is
Options- A. directly proportional to the square root of the molecular diffusivity
- B. inversely proportional to the square root of the molecular diffusivity
- C. directly proportional to the cube root of the molecular diffusivity
- D. indirectly proportional to the cube root of the molecular diffusivity Discuss
- 2. The collection efficiency by the inertial impaction mechanism is the function of
Options- A. Stokes and Reynolds number
- B. Stokes and Schmidt number
- C. Grashoff and Reynolds number
- D. Stokes and Grashof number Discuss
- 3. The usual method(s) to solve rate equation of simple enzyme kinetics is/are
Options- A. Michaelis Menten approach
- B. Briggs-Haldane approach
- C. Numerical solution approach
- D. all of these Discuss
- 4. The growth of an organism on glucose is described by the following Monod model parameters: ?m = 0.5 h-1 and Ks =0.1 g.l-1, if the concentration of glucose in the feed is 10 g.l-1 and the dilution rate is set to 0.4 h-1, then the steady state concentration of glucose in the effluent will be
Options- A. 0 g.l-1
- B. 0.5 g.l-1
- C. 1.0 g.l-1
- D. 10 g.l-1 Discuss
- 5. What is the ratio of diameter of impeller to the diameter of tank (Da:Dt)?
Options- A. 1 : 3
- B. 2 : 1
- C. 4 : 1
- D. 1 : 5 Discuss
- 6. The sterilization method depends
Options- A. nature of additive
- B. volume and feed rate
- C. both (a) and (b)
- D. none of these Discuss
- 7. Which is true about rennet?
Options- A. It is a mixture of protease chymosin and pepsin
- B. It is a mixture of rennin and pepsin
- C. Both (a) and (b)
- D. none of the above Discuss
- 8. Larger propellers turn at the speed of
Options- A. 20 to 150 rpm
- B. 150 to 300 rpm
- C. 400 to 800 rpm
- D. 1150 rpm Discuss
- 9. Most enzymes work by
Options- A. increasing energy of activation
- B. decreasing energy of activation
- C. not affecting energy of activation
- D. none of the above Discuss
- 10. When [S] = 0.1 *KM, the velocity of an enzyme catalyzed reaction is about:
Options- A. 0.1 * Vmax
- B. 0.3 * Vmax
- C. 0.5 * Vmax
- D. 0.7 * Vmax Discuss
More questions
Correct Answer: directly proportional to the square root of the molecular diffusivity
Correct Answer: Stokes and Reynolds number
Correct Answer: all of these
Correct Answer: 0.5 g.l-1
Correct Answer: 1 : 3
Correct Answer: both (a) and (b)
Correct Answer: Both (a) and (b)
Correct Answer: 400 to 800 rpm
Correct Answer: decreasing energy of activation
Correct Answer: 0.1 * Vmax
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