Discussion
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- Question
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
- Correct Answer
- bicarbonates of calcium and magnesium
- 1. Temporary hardness of water may be removed by adding
Options- A. calcium hydroxide
- B. calcium carbonate
- C. calcium chloride
- D. sodium bicarbonate Discuss
- 2. The methods used for biological treatment are
Options- A. lagoon
- B. activated sludge process
- C. oxidation ditches
- D. all of these Discuss
- 3. 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
- 4. 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
- 5. Permanent hardness of water may be removed by the addition of
Options- A. lime
- B. soda ash
- C. potassium permagnate
- D. sodium bicarbonate Discuss
- 6. Calgon is used for removal of
Options- A. sodium carbonate
- B. permanent hardness of water
- C. potassium carbonate
- D. none of these Discuss
- 7. 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
- 8. 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
- 9. When [S] = 0.1 *KM, the velocity of an enzyme catalyzed reaction is about:
Options- A. 0.1 * Vmax
- B. 0.3 * Vmax
- C. 0.5 * Vmax
- D. 0.7 * Vmax Discuss
- 10. Which of the following refers to pseudo steady state?
Options- A. d(CE)/dt = 0
- B. d(Cp)/dt = 0
- C. d(CES)/dt = 0
- D. d(Cs)/dt = d(CES)/dt Discuss
Water Treatment problems
Search Results
Correct Answer: calcium hydroxide
Correct Answer: all of these
Correct Answer: human feces
Correct Answer: both (a) and (b)
Correct Answer: soda ash
Correct Answer: permanent hardness of water
Correct Answer: UV radiation
Correct Answer: decreasing energy of activation
Correct Answer: 0.1 * Vmax
Correct Answer: d(CES)/dt = 0
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