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Biochemical Engineering - Agitation and Aeration

Exercise : Agitation and Aeration - Section 1
31.
Power number is ratio of
imposed forced to intertial force
bouyant force to inertial force
gravitation force to inertial force
imposed force to gravitational force
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
The volume of liquid (VL) in a cylindrical reactor can be calculated from the liquid height (HL) and tank diameter (Dt) using the following equation
VL = 4/3 x π x HL x Dt3/8
VL= HL x π x Dt2/4
VL= HL x π x Dt2
VL = 4 x π x Dt2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
The average fractional gas hold up (H) can be given as (where Zf and Zl are the level of aerated and clear liquid respectively)
H = (Zf-Zl)/Zf
H = Zf/Zl
H = Zf/ZfZl
H =(Zf+Zl)/Zf
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
Which of the following(s) is/are non-mechanically agitated reactors?
Stirrer tank reactor
Bubble column
Air lift reactor
Both (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
Which of the following best explains the reasons for using axial flow impellers in crystallization and precipitation reactions?
Crystal and precipitates are not too small, so as to ensure easy separation of the solids from the mother liquor
Crystals and precipitates are thoroughly broken down, so as to ensure easy separation of the solids from the mother liquor
Both (a) and (b)
Axial flow impellers provide low shear, energy efficient mixing conditions
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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