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  • Question

  • The dimensions of a rectangular settling tank are : length 24 m, width 6 m and depth 3 m. If 2 hour detention period for tanks is recommended, the rate of flow of sewage per hour, is


  • Options
  • A. 204 cu m
  • B. 208 cu m
  • C. 212 cu m
  • D. 216 cu m
  • E. 220 cu m.

  • Correct Answer
  • 216 cu m 

    • Waste Water Engineering problems

    Search Results

    • 1. Pick up the correct statement from the following :

    • Options
    • A. pH value indicates acidity and alkalinity of sewage
    • B. In acidic sewage, the pH value is less than 7
    • C. In alkaline sewage, the pH value is more than 7
    • D. Fresh sewage is generally alkaline
    • E. All the above.
      • Discuss
    • 2. The asbestos cement pipes are generally laid

    • Options
    • A. horizontally
    • B. vertically
    • C. at an angle of 30°
    • D. at an angle of 60°.
      • Discuss
    • 3. In SI units the power of sound is represented in

    • Options
    • A. kgs
    • B. joules
    • C. neutons
    • D. watts.
      • Discuss
    • 4. The ratio of maximum sewage flow to average sewage flow for mains up to 1 m in diameter, is

    • Options
    • A. 1.5
    • B. 2.0
    • C. 3.0
    • D. 4.0
      • Discuss
    • 5. Disposal to sewage in large cities, is done in

    • Options
    • A. irrigation
    • B. dilution
    • C. oxidation
    • D. putrifaction.
      • Discuss
    • 6. For evaporation and measurement of settlable solids, the apparatus used, is

    • Options
    • A. a jar
    • B. a breaker
    • C. a test tube
    • D. an Imhoff cone.
      • Discuss
    • 7. In sewers the effect of scouring is more on

    • Options
    • A. top side
    • B. bottom side
    • C. horizontal side
    • D. all sides.
      • Discuss
    • 8. In olden days the type of section adopted in trunk and out fall sewers was

    • Options
    • A. parabolic shaped
    • B. horse shoe shaped
    • C. egg shaped
    • D. circular shaped.
      • Discuss
    • 9. For house drainage minimum gradient is

    • Options
    • A. 1 in 60
    • B. 1 in 80
    • C. 1 in 10
    • D. 1 in 400
      • Discuss
    • 10. For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed

    • Options
    • A. 3 PPm
    • B. 4 PPm
    • C. 5 PPm
    • D. 10 ppm.
      • Discuss

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