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Biochemical Engineering - Agitation and Aeration

Exercise : Agitation and Aeration - Section 2
11.
Which of the following is not classified as an axial flow impeller?
A propeller
A marine impeller
A Rushton turbine
A hydrofoil impeller
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Power number (Np) is also known as
Froude's number
Bond's number
Newton's number
Rayleigh's number
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Flooding is a condition/phenomenon which occur in a bioreactor when
The air escapes without being distributed by the agitator
The fermenter medium spills out the reactor due to foaming
The volume of foam is more than the volume of broth
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
A cylindrical reactor has a liquid volume of 100,000 litres. It has an aspect ratio the ratio of the channel height to width of 1:1. The height of the liquid in the reactor will be approximately:
1.0 m
3.0 m
5.0 m
7.0 m
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Detergent like substances produced by microorganisms during a fermentation will lead to
decrease the surface tension of the liquid
accumulate at the gas liquid interface
decrease the rate of bubble coalescence
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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