Discussion
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- Question
The activated sludge process is sometime referred as
Options- A. fluid bed biological oxidation system
- B. fixed bed biological oxidation system
- C. turning bed biological oxidation system
- D. none of the above
- Correct Answer
- fluid bed biological oxidation system
- 1. Sanitizer used specifically for vitreous enamel are
Options- A. strong alkalis
- B. strong acids
- C. weak alkali with sodium silicate
- D. none of these Discuss
- 2. Which of the following substances are commonly used in a filter?
Options- A. Charcoal
- B. Sand
- C. Both (a) and (b)
- D. Aluminum chloride Discuss
- 3. BOD stands for
Options- A. biochemical oxygen demand
- B. british oxygen demand
- C. british oxygen depletion
- D. biological oxygen depletion Discuss
- 4. Sanitizers used for rubber made equipments are
Options- A. strong acids
- B. strong alkalis
- C. combination of both
- D. none of these Discuss
- 5. The activated sludge process consists of returning a portion of the clarifier
Options- A. effluent water entering the reactor
- B. influent water coming out of the reactor
- C. influent water entering the reactor
- D. effluent water coming out of the reactor Discuss
- 6. From the following sanitizers which one comes under category of surface active agents?
Options- A. Tetra phosphate
- B. Teepol
- C. Meta phosphate
- D. None of these Discuss
- 7. The ultimate source of water is
Options- A. rivers and lakes
- B. dew and forest
- C. rain and snow
- D. underground and surface Discuss
- 8. Zeolite softening process removes both temporary and permanent hardness of water. In this process the calcium and magnesium present in water are precipitated as
Options- A. insoluble carbonates
- B. insoluble zeolites
- C. insoluble chlorides
- D. insoluble sulfates Discuss
- 9. The maximum permissible limit (BIS) of turbidity in drinking water is
Options- A. 5 NTU
- B. 10 NTU
- C. 15 NTU
- D. 20 NTU Discuss
- 10. Zeolite used in zeolite softening process for the treatment of hard water gets exhausted after certain time of usage but can be regenerated by flushing it with
Options- A. 10% calcium chloride solution
- B. 10% magnesium sulfate solution
- C. 10% magnesium chloride solution
- D. 10% sodium chloride solution Discuss
Water Treatment problems
Search Results
Correct Answer: weak alkali with sodium silicate
Correct Answer: Both (a) and (b)
Correct Answer: biochemical oxygen demand
Correct Answer: strong alkalis
Correct Answer: influent water entering the reactor
Correct Answer: Teepol
Correct Answer: rain and snow
Correct Answer: insoluble zeolites
Correct Answer: 10 NTU
Correct Answer: 10% sodium chloride solution
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