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  • Question
  • If average volume of sediment deposits is one-tenth million cubic metres per year in a reservoir of total capacity 10 million cubic metres, the dead storage will be filled up, in


  • Options
  • A. 10 years
  • B. 15 years
  • C. 20 years
  • D. 25 years
  • E. 50 years.

  • Correct Answer
  • 25 years 


  • Water Supply Engineering problems


    Search Results


    • 1. Ground water from artesian wells

    • Options
    • A. contains no suspended materials
    • B. contains dissolved salts
    • C. may be saltish and hard
    • D. generally require lesser treatment
    • E. all the above.
    • Discuss
    • 2. Normal values of overflow rate for sedimentation tanks using coagulants in litres/hr/m2 , generally range between

    • Options
    • A. 250 to 500
    • B. 500 to 750
    • C. 750 to 1000
    • D. 1000 to 1250
    • Discuss
    • 3. The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called

    • Options
    • A. Working pressure
    • B. Design pressure
    • C. Test pressure
    • D. Hydrostatic pressure.
    • Discuss
    • 4. The ensure proper growth of children's teeth, the quantity of flouride used in water mains, is

    • Options
    • A. 1 mg/litre
    • B. 2 mg/litre
    • C. 3 mg/litre
    • D. 4 mg/litre
    • E. 5 mg/litre.
    • Discuss
    • 5. The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form

    • Options
    • A. Mono-chloramine (NHCl)
    • B. Di-chloramine (NH2Cl)
    • C. Nitrogen trichloramine (NCl3)
    • D. All the above.
    • Discuss
    • 6. The total domestic consumption in a city water supply, is assumed

    • Options
    • A. 20%
    • B. 30%
    • C. 40%
    • D. 60%.
    • Discuss
    • 7. In distribution pipes, air valves are provided at

    • Options
    • A. lower points
    • B. junction points
    • C. higher points
    • D. any where.
    • Discuss
    • 8. The maximum permissible chloride content in treated water of public water supplies should not exceed

    • Options
    • A. 50 P.P.M.
    • B. 100 P.P.M.
    • C. 150 P.P.M.
    • D. 200 P.P.M.
    • E. 250 P.P.M.
    • Discuss
    • 9. The bacterias which may survive with or without free oxygen, are called

    • Options
    • A. Aerobic bacterias
    • B. Anaerobic bacterias
    • C. Faculative bacteria's
    • D. None of these.
    • Discuss
    • 10. The most important and widely used tube well in India, is

    • Options
    • A. strainer well
    • B. cavity well
    • C. slotted well
    • D. perforated pipe well.
    • Discuss


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