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Biochemical Engineering - Agitation and Aeration

Exercise : Agitation and Aeration - Section 1
26.
Turbine impeller consists of flat impeller blades with
a vertical pitch welded directly to the shaft
a angled pitch welded directly to the shaft
a vertical pitch welded to a horizontal disk
a angled pitch welded to a horizontal disk
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
An aerated bioreactor will increase oxygen transfer rates with the addition of detergents because it
enhances bubble coalescence
causes bubbles to expand
discourages bubble coalescence
increases the surface tension of the liquid
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Vortexing in stirred tank reactors can be prevented by
installing baffles in the reactor
shifting the impeller to an off-centre position
Both (a) and (b)
using axial flow impellers
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
Which of the following would be best described as an axial flow impeller?
An impeller with blades pitched at 45° to the vertical
An impeller which directs liquid flow towards the base of the reactor
Both (a) and (b)
An impeller with blades pitched at 75° to the vertical
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Henry's law relates
the partial pressure of oxygen and the saturation concentration of oxygen in the liquid
the oxygen transfer rate and the bubble size
the oxygen transfer rate and the temperature
the oxygen transfer rate to the partial pressure of oxygen in the liquid
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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