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Home Biochemical Engineering Water Treatment Comments

  • Question
  • BOD stands for


  • Options
  • A. biochemical oxygen demand
  • B. british oxygen demand
  • C. british oxygen depletion
  • D. biological oxygen depletion

  • Correct Answer
  • biochemical oxygen demand 


  • Water Treatment problems


    Search Results


    • 1. Sanitizers used for rubber made equipments are

    • Options
    • A. strong acids
    • B. strong alkalis
    • C. combination of both
    • D. none of these
    • Discuss
    • 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
    • 3. Secondary treatment uses __________ to consume wastes.

    • Options
    • A. micro-organisms
    • B. chemicals
    • C. filtration
    • D. none of these
    • Discuss
    • 4. The sterilization method depends

    • Options
    • A. nature of additive
    • B. volume and feed rate
    • C. both (a) and (b)
    • D. none of these
    • Discuss
    • 5. The filter material used for air filtration system is/are

    • Options
    • A. glass wool
    • B. glass fibre
    • C. norite
    • D. all of the above
    • Discuss
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. The ultimate source of water is

    • Options
    • A. rivers and lakes
    • B. dew and forest
    • C. rain and snow
    • D. underground and surface
    • Discuss


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