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Biochemical Engineering
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Water Treatment
See What Others Are Saying!
Question
The ultimate source of water is
Options
A. rivers and lakes
B. dew and forest
C. rain and snow
D. underground and surface
Correct Answer
rain and snow
More questions
1. The region of an airlift bioreactor in which the liquid travels in a downward direction is called the
Options
A. downcomer
B. disengagement zone
C. air riser
D. flotsam
Show Answer
Scratch Pad
Discuss
Correct Answer: downcomer
2. Laminar flow range of mixing speed is obtained for
Options
A.
Re
i
<10
B. 10<
Re
i
<10
4
C.
Re
i
>10
4
D. None of these
Show Answer
Scratch Pad
Discuss
Correct Answer:
Re
i
<10
3. A liquid is flowing at 11,400 l.h
-1
along a pipeline having a diameter of 4 cm. If the liquid has a density of 1 g.ml
-1
and viscosity of 0.001kg.m
-1
.s
-1
, then the liquid would be in the
Options
A. laminar phase
B. transient phase
C. turbulent phase
D. any of the phase
Show Answer
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Discuss
Correct Answer: turbulent phase
4. Pluronic F68 protects mammalian cells from damage stems as it is a/an
Options
A. surface active agent which stabilizes foams
B. surface active agent which destabilizes foams
C. excellent source of vitamins
D. coagulant
Show Answer
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Discuss
Correct Answer: surface active agent which stabilizes foams
5. An aerated bioreactor will increase oxygen transfer rates with the addition of detergents because it
Options
A. enhances bubble coalescence
B. causes bubbles to expand
C. discourages bubble coalescence
D. increases the surface tension of the liquid
Show Answer
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Discuss
Correct Answer: discourages bubble coalescence
6. When substrate [S] = K
M
(Michaelis-Menten constant), the velocity of an enzyme catalyzed reaction is about
Options
A. 0.1 * V
max
B. 0.2 * V
max
C. 0.5 * V
max
D. 0.9 * V
max
Show Answer
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Discuss
Correct Answer: 0.5 * V
max
7. Commonly employed water insoluble supports for the covalent attachment of enzyme include
Options
A. acrylamide based polymers
B. polypeptides
C. dextran
D. all of these
Show Answer
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Discuss
Correct Answer: all of these
8. Which of the following(s) is/are non-mechanically agitated reactors?
Options
A. Stirrer tank reactor
B. Bubble column
C. Air lift reactor
D. Both (b) and (c)
Show Answer
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Correct Answer: Both (b) and (c)
9. Which of the following affect the Kolmogorov eddy size?
Options
A. Stirrer speed
B. Physical properties of the liquid
C. Size and type of impeller
D. All of these
Show Answer
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Correct Answer: All of these
10. The mechanical means of accomplishing sterilization of fermentation media/equipment is
Options
A. ultrasonic
B. radiation
C. chemical agents
D. none of these
Show Answer
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Discuss
Correct Answer: ultrasonic
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More in Biochemical Engineering:
Agitation and Aeration
Downstream Processing
Enzymes and Application
Enzymes and Kinetics
Fermentation Kinetics
Fermentation Reactors
Fluid Flow
Immobilized Enzyme
Sterilization
Water Treatment