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  • Question
  • 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

  • Correct Answer
  • Teepol 


  • Water Treatment problems


    Search Results


    • 1. 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
    • 2. 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
    • 3. 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
    • 4. BOD stands for

    • Options
    • A. biochemical oxygen demand
    • B. british oxygen demand
    • C. british oxygen depletion
    • D. biological oxygen depletion
    • Discuss
    • 5. Sanitizers used for rubber made equipments are

    • Options
    • A. strong acids
    • B. strong alkalis
    • C. combination of both
    • D. none of these
    • Discuss
    • 6. The ultimate source of water is

    • Options
    • A. rivers and lakes
    • B. dew and forest
    • C. rain and snow
    • D. underground and surface
    • Discuss
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. The maximum desirable limit Bureau of Indian Standards (BIS) of lead in the drinking water is

    • Options
    • A. 0.05 mg/l
    • B. 0.09 mg/l
    • C. 0.1 mg/l
    • D. 1.0 mg/l
    • Discuss


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