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Biochemical Engineering - Agitation and Aeration

Exercise : Agitation and Aeration - Section 1
36.
Which of the following will have the highest surface area available for oxygen transfer?
A shake flask
A standing test tube
A non-sparged stirred tank reactor agitated at 400 rpm
A sparged stirred tank reactor agitated at 400 rpm
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
A flooded impeller will lead to poor oxygen transfer rates because
bubbles tend to coalesce under the impeller
bubbles tend to break down too rapidly under high shear conditions
bubbles tend to move too quickly through the bulk liquid
the cells clog up the surface of the bubble
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Power consumption by agitation is
a function of physical properties
a function of operating conditions
a function of vessel and impeller geometry
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Which of the following impellers will provide radial flow?
Paddles
Flat blade turbines
Disk flat blade turbines
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
When liquid is pumped through cooling coil in a stirred tank reactor to cool. Which of the following is not correct?
If the stirrer speed is increased, the rate will be faster
Baffles in the tank will increase the rate of cooling
Faster cooling rates at a slower rate of pumping
Faster cooling rates at a faster rate of pumping
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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