Agitation And Aeration | Biochemical Engineering

When the height of an aerated bioreactor is increased, it will increase the oxygen transfer rate by

Byadmin July 19, 2022

Question: When the height of an aerated bioreactor is increased, it will increase the oxygen transfer rate by
[A].

increasing the partial pressure of oxygen at the base of the reactor

[B].

decreasing the saturation concentration of oxygen in the reactor

[C].

decreasing the gas-holdup

[D].

all of the above

Answer: Option A

Explanation:

No answer description available for this question.

Biochemical Engineering | Fermentation Reactors

A microorganism which is subjected to the Crabtree effect is most likely to

Question: A microorganism which is subjected to the Crabtree effect is most likely to
[A].

ferment in the presence of low concentrations of sugar and dissolved oxygen
[B].
respire in the presence of low sugar and high dissolved oxygen concentrations
[C].
ferment in the presence of high concentrations of sugar and dissolved oxygen
[D].
respire in the presence of high sugar and low dissolved oxygen concentrations

Answer: Option C

Explanation:

No answer description available for this question.

Read More A microorganism which is subjected to the Crabtree effect is most likely to
Agitation And Aeration | Biochemical Engineering

Which of the following is not classified as an axial flow impeller?

Question: Which of the following is not classified as an axial flow impeller?
[A].

A propeller
[B].
A marine impeller
[C].
A Rushton turbine
[D].
A hydrofoil impeller

Answer: Option C

Explanation:

No answer description available for this question.

Read More Which of the following is not classified as an axial flow impeller?
Biochemical Engineering | Fluid Flow

The viscosity of a fluid changes with either stirrer speed or mixing time. But when mixing ceases, the viscosity returns to its original state. This fluid is best described as

Question: The viscosity of a fluid changes with either stirrer speed or mixing time. But when mixing ceases, the viscosity returns to its original state. This fluid is best described as
[A].

newtonian
[B].
rheopectic
[C].
viscoelastic
[D].
thixotropic

Answer: Option C

Explanation:

No answer description available for this question.

Read More The viscosity of a fluid changes with either stirrer speed or mixing time. But when mixing ceases, the viscosity returns to its original state. This fluid is best described as
Biochemical Engineering | Immobilized Enzyme

Which of the following is the commonly employed adsorbents?

Question: Which of the following is the commonly employed adsorbents?
[A].

Calcium carbonate
[B].
Alumina
[C].
Celluloses
[D].
All of these

Answer: Option D

Explanation:

No answer description available for this question.

Read More Which of the following is the commonly employed adsorbents?
Biochemical Engineering | Fermentation Reactors

A strain of Escherichia coli has a maximum specific growth rate of 0.8 h-1 on a glucose based medium. If this organism is being grown in a chemostat with a dilution rate of 1.2 h-1, then at steady state the concentration of E. coli in the same medium will

Question: A strain of Escherichia coli has a maximum specific growth rate of 0.8 h-1 on a glucose based medium. If this organism is being grown in a chemostat with a dilution rate of 1.2 h-1, then at steady state the concentration of E. coli in the same medium will
[A].

increase
[B].
be zero
[C].
change randomly
[D].
decrease

Answer: Option B

Explanation:

No answer description available for this question.

Read More A strain of Escherichia coli has a maximum specific growth rate of 0.8 h-1 on a glucose based medium. If this organism is being grown in a chemostat with a dilution rate of 1.2 h-1, then at steady state the concentration of E. coli in the same medium will
Agitation And Aeration | Biochemical Engineering

Swirling and vortex formation can be prevented by

Question: Swirling and vortex formation can be prevented by
[A].

using baffles
[B].
using diffusion ring with turbines
[C].
both (a) and (b)
[D].
none of these

Answer: Option C

Explanation:

No answer description available for this question.

Read More Swirling and vortex formation can be prevented by

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