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- Question
A typical ceiling fan would be best described as a(n)
Options- A. radial flow impeller
- B. axial flow impeller
- C. intermig impeller
- D. Rushton turbine
- Correct Answer
- axial flow impeller
- 1. The best described action of Pluronic F68 (non-ionic detergent) in a cell culture medium is that, it
Options- A. acts on the surface properties of the cells and the culture medium
- B. provides nutrients for the cells
- C. acts as a flocculant
- D. acts as a coagulant Discuss
- 2. Mixing in stirred tank reactors can
Options- A. be described as either laminar, transient or turbulent
- B. achieve turbulent conditions by increasing the stirrer speed
- C. induce laminar flow conditions by the addition of baffles
- D. all of the above Discuss
- 3. Newtonian fluid is one in which the viscosity
Options- A. remains constant with time and power input
- B. increases with the level of power input
- C. decreases with the level of power input
- D. drastically increases with the level of power input Discuss
- 4. The viscosity of liquid was classified as both dilatant and rheopectic, which means that the viscosity
Options- A. increased with stirring speed but decreased with mixing time
- B. increased with stirring speed and increased with mixing time
- C. decreased with stirring speed but increased with mixing time
- D. decreased with stirring speed and decreased with mixing time Discuss
- 5. The conventional filtration involves the separation of large particles generally
Options- A. dp>5?m
- B. dp>10?m
- C. dp>15?m
- D. dp>20?m Discuss
- 6. The maximum specific growth rate (?m) of an organism in batch culture is equal to slope of a plot of
Options- A. In [biomass] against time for exponential phase data only
- B. In [biomass] against time
- C. biomass against time
- D. biomass against time for stationary phase data only Discuss
- 7. Which of the following substances are commonly used in a filter?
Options- A. Charcoal
- B. Sand
- C. Both (a) and (b)
- D. Aluminum chloride Discuss
- 8. The relationship between Keq, Km and Vmax is known as
Options- A. Haldane equation
- B. Michaelis Menten equation
- C. Numerical solution approach
- D. Gibbs-Helmholtz equation Discuss
- 9. The optimum wet solid content for the cell suspension for a bead mill is typically somewhere between
Options- A. 5-15% by volume
- B. 15-30% by volume
- C. 30-60% by volume
- D. 60-90% by volume Discuss
- 10. Analogus to the molecular diffusion, the x-directional flux of microorganisms suspended in a medium due to the axial mixing can be represented as (where Jn is flux component 'n', cn is concentration of'n')
Options- A. Jn = -dcn/dx
- B. Jn = dcn/dx
- C. Jn = -D dcn/dx
- D. Jn = D dcn/dx Discuss
More questions
Correct Answer: acts on the surface properties of the cells and the culture medium
Correct Answer: be described as either laminar, transient or turbulent
Correct Answer: remains constant with time and power input
Correct Answer: increased with stirring speed and increased with mixing time
Correct Answer: dp>10?m
Correct Answer: In [biomass] against time for exponential phase data only
Correct Answer: Both (a) and (b)
Correct Answer: Haldane equation
Correct Answer: 30-60% by volume
Correct Answer: Jn = -D dcn/dx
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