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Biochemical Engineering
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Water Treatment
Comments
Question
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
Correct Answer
human feces
Water Treatment problems
Search Results
1. 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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Correct Answer: both (a) and (b)
2. Permanent hardness of water may be removed by the addition of
Options
A. lime
B. soda ash
C. potassium permagnate
D. sodium bicarbonate
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Correct Answer: soda ash
3. Both temporary and permanent hardness of water can be removed by
Options
A. boiling
B. distillation
C. filtration
D. decantation
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Correct Answer: distillation
4. Application of quaternary ammonium compounds as sanitizing agents tends to
Options
A. favor gram positive bacteria
B. decrease gram positive bacteria
C. increase the percentage of gram(-)ve rods on utensils
D. none of the above
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Correct Answer: increase the percentage of gram(-)ve rods on utensils
5. Inhibitors are used along with sanitizer to
Options
A. improve their action
B. to prevent corrosion
C. both (a) and (b)
D. none of these
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Correct Answer: to prevent corrosion
6. The methods used for biological treatment are
Options
A. lagoon
B. activated sludge process
C. oxidation ditches
D. all of these
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Correct Answer: all of these
7. Temporary hardness of water may be removed by adding
Options
A. calcium hydroxide
B. calcium carbonate
C. calcium chloride
D. sodium bicarbonate
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Correct Answer: calcium hydroxide
8. 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
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Correct Answer: bicarbonates of calcium and magnesium
9. Calgon is used for removal of
Options
A. sodium carbonate
B. permanent hardness of water
C. potassium carbonate
D. none of these
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Correct Answer: permanent hardness of water
10. 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
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Correct Answer: UV radiation
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Enzymes and Kinetics
Fermentation Kinetics
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Immobilized Enzyme
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Water Treatment