Water Treatment problems
- 1. Secondary treatment uses __________ to consume wastes.
Options- A. micro-organisms
- B. chemicals
- C. filtration
- D. none of these Discuss
Correct Answer: micro-organisms
- 2. 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
Correct Answer: influent water entering the reactor
- 3. Sanitizers used for rubber made equipments are
Options- A. strong acids
- B. strong alkalis
- C. combination of both
- D. none of these Discuss
Correct Answer: strong alkalis
- 4. BOD stands for
Options- A. biochemical oxygen demand
- B. british oxygen demand
- C. british oxygen depletion
- D. biological oxygen depletion Discuss
Correct Answer: biochemical oxygen demand
- 5. 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
Correct Answer: Both (a) and (b)
- 6. 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
Correct Answer: weak alkali with sodium silicate
- 7. 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 Discuss
Correct Answer: fluid bed biological oxidation system
- 8. 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
Correct Answer: Teepol
- 9. The ultimate source of water is
Options- A. rivers and lakes
- B. dew and forest
- C. rain and snow
- D. underground and surface Discuss
Correct Answer: rain and snow
- 10. 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
Correct Answer: insoluble zeolites
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