Biochemical Engineering

Question: The Komologorov eddy size
[A].

is constant at all stirrer speeds

[B].

increases with stirrer speed

[C].

decreases with stirrer speed

[D].

becomes zero when the stirrer speed is very low

Answer: Option C

Explanation:

No answer description available for this question.

Question: Which of the following affect the Kolmogorov eddy size?
[A].

Stirrer speed

[B].

Physical properties of the liquid

[C].

Size and type of impeller

[D].

All of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Which of the following describes the importance of the Kolmogorov eddy size in the biotechnology?
[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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Bubble free aeration systems requires
[A].

silicone tubing or gas permeable membranes to facilitate gas transfer

[B].

carbon dioxide instead of air to supply oxygen

[C].

silicone tubing or gas permeable membranes to remove carbon dioxide by oxygen in the form of hydrogen peroxide

[D].

filled headspace of the reactor with carbon dioxide

Answer: Option A

Explanation:

No answer description available for this question.

Question: In animal cell bioreactor, bubble damage can be minimized by
[A].

the addition of a shear protectorant

[B].

using a bubble free oxygen delivery system

[C].

headspace aeration

[D].

all of the above

Answer: Option D

Explanation:

No answer description available for this question.

Question: Which of the following can act as a shear protectorant?
[A].

Serum

[B].

Silicone oil

[C].

Glucose

[D].

Glutamic acid

Answer: Option A

Explanation:

No answer description available for this question.

Question: Pluronic F68 is added to cell culture media as
[A].

a nutrient

[B].

a shear protectorant

[C].

to increase oxygen transfer rates

[D].

all of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: The best described action of Pluronic F68 (non-ionic detergent) in a cell culture medium is that, it
[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

Answer: Option A

Explanation:

No answer description available for this question.

Question: A liquid is flowing at 11,400 l.h-1 along a pipeline having a diameter of 4 cm. If the liquid has a density of 1 g.ml-1 and viscosity of 0.001kg.m-1.s-1, then the liquid would be in the
[A].

laminar phase

[B].

transient phase

[C].

turbulent phase

[D].

any of the phase

Answer: Option C

Explanation:

No answer description available for this question.

Question: Reynolds number for turbulent flow over a plate should be more than
[A].

5 x 10-5

[B].

106

[C].

5 x 105

[D].

500

Answer: Option B

Explanation:

No answer description available for this question.