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Biochemical Engineering
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Water Treatment
Comments
Question
Calgon is used for removal of
Options
A. sodium carbonate
B. permanent hardness of water
C. potassium carbonate
D. none of these
Correct Answer
permanent hardness of water
Water Treatment problems
Search Results
1. Temporary hardness of water is caused by the presence of
Options
A. chlorides of calcium and magnesium
B. sulfates of calcium and magnesium
C. bicarbonates of calcium and magnesium
D. carbonates of sodium and potassium
Show Answer
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Discuss
Correct Answer: bicarbonates of calcium and magnesium
2. Temporary hardness of water may be removed by adding
Options
A. calcium hydroxide
B. calcium carbonate
C. calcium chloride
D. sodium bicarbonate
Show Answer
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Discuss
Correct Answer: calcium hydroxide
3. The methods used for biological treatment are
Options
A. lagoon
B. activated sludge process
C. oxidation ditches
D. all of these
Show Answer
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Discuss
Correct Answer: all of these
4. Coliform bacteria in water is an indication of the presence of
Options
A. radioactive wastes
B. excess fertilizer
C. decaying animals and plants
D. human feces
Show Answer
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Discuss
Correct Answer: human feces
5. The common methods used for disinfection in waste water treatment plants are
Options
A. chlorination
B. UV light
C. both (a) and (b)
D. Phenolic solvent
Show Answer
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Discuss
Correct Answer: both (a) and (b)
6. Which of the following physical method is used as germicidal in modern time for the treatment of drinking water?
Options
A. Chlorination
B. Treating with potassium permagnate
C. UV radiation
D. Treating with bleaching powder
Show Answer
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Discuss
Correct Answer: UV radiation
7. Most enzymes work by
Options
A. increasing energy of activation
B. decreasing energy of activation
C. not affecting energy of activation
D. none of the above
Show Answer
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Discuss
Correct Answer: decreasing energy of activation
8. When [S] = 0.1 *K
M
, the velocity of an enzyme catalyzed reaction is about:
Options
A. 0.1 * V
max
B. 0.3 * V
max
C. 0.5 * V
max
D. 0.7 * V
max
Show Answer
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Correct Answer: 0.1 * V
max
9. Which of the following refers to pseudo steady state?
Options
A. d(C
E
)/dt = 0
B. d(C
p
)/dt = 0
C. d(C
ES
)/dt = 0
D. d(C
s
)/dt = d(C
ES
)/dt
Show Answer
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Discuss
Correct Answer: d(C
ES
)/dt = 0
10. In the steady state the material balance equation for any component of a system is
Options
A. rate of addition + rate of removal - rate of formation = 0
B. rate of addition - rate of removal + rate of formation = 0
C. rate of addition + rate of removal + rate of formation = 0
D. none of the above
Show Answer
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Discuss
Correct Answer: rate of addition - rate of removal + rate of formation = 0
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Enzymes and Application
Enzymes and Kinetics
Fermentation Kinetics
Fermentation Reactors
Fluid Flow
Immobilized Enzyme
Sterilization
Water Treatment