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  • Question
  • The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is


  • Options
  • A. 0.05552 cumec
  • B. 0.05554 cumec
  • C. 0.05556 cumec
  • D. 0.0556 cumec
  • E. 0.0558 cumec.

  • Correct Answer
  • 0.05556 cumec 


  • Waste Water Engineering problems


    Search Results


    • 1. Depletion of ozone layer in the outer atmosphere may cause

    • Options
    • A. lung cancer
    • B. skin cancer
    • C. bronchitis
    • D. heart disorder.
    • Discuss
    • 2. The pH value of fresh sewage is usually

    • Options
    • A. equal to 7
    • B. more than 7
    • C. less than 7
    • D. equal to zero.
    • Discuss
    • 3. At the junction of sewers

    • Options
    • A. top of smaller sewer is kept lower
    • B. top of larger sewer is kept lower
    • C. tops of both the sewers are at the same level
    • D. none of these.
    • Discuss
    • 4. For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is

    • Options
    • A. 16 m
    • B. 20 m
    • C. 24 m
    • D. 30 m.
    • Discuss
    • 5. If the peak discharge of a storm water drain (S.W. Drain) is e.xpected to exceed 150 cumecs, the free board to be provided, is

    • Options
    • A. 100 cm
    • B. 90 cm
    • C. 80 cm
    • D. 50 cm.
    • Discuss
    • 6. Sluge banks are formed if sewage is disposed of in

    • Options
    • A. rivers
    • B. seas
    • C. lakes
    • D. none of these.
    • Discuss
    • 7. Lead acetate test in sewer manhole is done to test the presence of

    • Options
    • A. Methane gas
    • B. Hydrogen sulphide
    • C. Carbondioxide gas
    • D. Diesel vapours.
    • Discuss
    • 8. Dried sewage after treatment is used as

    • Options
    • A. fertilizer
    • B. building material
    • C. chemical for lowering B.O.D.
    • D. base material for paints.
    • Discuss
    • 9. The maximum diameter of sewers adopted in the designs is

    • Options
    • A. 1.0 m
    • B. 2.0 m
    • C. 3.0 m
    • D. 4.0 m.
    • Discuss
    • 10. Lead caulked joints are used for laying

    • Options
    • A. stone ware pipes
    • B. earthern ware pipes
    • C. C.I. pipes
    • D. G.I. pipes.
    • Discuss


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