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Waste Water Engineering problems

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

  • Options
  • A. lung cancer
  • B. skin cancer
  • C. bronchitis
  • D. heart disorder.
    • Discuss
  • 4. 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.
    • Discuss
  • 5. Sluge banks are formed if sewage is disposed of in

  • Options
  • A. rivers
  • B. seas
  • C. lakes
  • D. none of these.
    • Discuss
  • 6. 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
  • 7. 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
  • 8. 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
  • 9. 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
  • 10. The design period of sewage treatment works in normally

  • Options
  • A. 5 - 10 years
  • B. 15 - 20 years
  • C. 30 - 40 years
  • D. 40 - 50 years.
    • Discuss

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