Discussion
Home ‣ Biochemical Engineering ‣ Water Treatment Comments
- Question
The methods used for biological treatment are
Options- A. lagoon
- B. activated sludge process
- C. oxidation ditches
- D. all of these
- Correct Answer
- all of these
- 1. 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 Discuss
- 2. 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 Discuss
- 3. Permanent hardness of water may be removed by the addition of
Options- A. lime
- B. soda ash
- C. potassium permagnate
- D. sodium bicarbonate Discuss
- 4. Both temporary and permanent hardness of water can be removed by
Options- A. boiling
- B. distillation
- C. filtration
- D. decantation Discuss
- 5. 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 Discuss
- 6. Temporary hardness of water may be removed by adding
Options- A. calcium hydroxide
- B. calcium carbonate
- C. calcium chloride
- D. sodium bicarbonate Discuss
- 7. 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 Discuss
- 8. Calgon is used for removal of
Options- A. sodium carbonate
- B. permanent hardness of water
- C. potassium carbonate
- D. none of these Discuss
- 9. 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 Discuss
- 10. 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 Discuss
Water Treatment problems
Search Results
Correct Answer: human feces
Correct Answer: both (a) and (b)
Correct Answer: soda ash
Correct Answer: distillation
Correct Answer: increase the percentage of gram(-)ve rods on utensils
Correct Answer: calcium hydroxide
Correct Answer: bicarbonates of calcium and magnesium
Correct Answer: permanent hardness of water
Correct Answer: UV radiation
Correct Answer: decreasing energy of activation
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