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Home Civil Engineering Water Supply Engineering Comments

  • Question
  • Maximum permissible colour for domestic water supplies, based on Cobalt scale, is


  • Options
  • A. 5 P.P.M.
  • B. 10 P.P.M.
  • C. 15 P.P.M.
  • D. 20 P.P.M.
  • E. 25 P.P.M.

  • Correct Answer
  • 20 P.P.M. 


  • Water Supply Engineering problems


    Search Results


    • 1. For a city developed haphazardly, the layout of distribution pipes preferred to, is

    • Options
    • A. ring system
    • B. radial system
    • C. grid iron system
    • D. dead end system.
    • Discuss
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. In distribution pipes, air valves are provided at

    • Options
    • A. lower points
    • B. junction points
    • C. higher points
    • D. any where.
    • Discuss
    • 6. In centrifugal pump installation,

    • Options
    • A. pump is properly primed before starting
    • B. the diameter of the pipe at inlet as well as at outlet, is kept smaller than the delivery pipe
    • C. the foot valve fitted at the bottom end of the suction pipe, prevents the movement of water from the pump when it is stopped
    • D. the motor may burn out if it is started with empty delivery pipe and with open gate valve
    • E. all the above.
    • Discuss
    • 7. Water is distributed to consumers by gravitational system, in

    • Options
    • A. Dehradun
    • B. Bombay
    • C. Delhi
    • D. Calcutta
    • E. Both (a) and (b).
    • Discuss
    • 8. For a network of distribution pipes of a proposed township shown in the below figure, the layout of distribution system, is

    • Options
    • A. dead end system
    • B. grid-iron system
    • C. ring system
    • D. radial system.
    • Discuss
    • 9. Chlorination of water does not remove

    • Options
    • A. ammonia content
    • B. B.O.D.
    • C. organic matter content
    • D. dissolved oxygen.
    • Discuss
    • 10. Pick up the incorrect statement from the following :

    • Options
    • A. The flow in strainer type wells is radial
    • B. The flow in cavity type wells in spherical
    • C. In strainer type wells, area of flow depends upon the length of the strainer pipe
    • D. In cavity type wells, area of flow depends upon the size of the cavity
    • E. None of these.
    • Discuss


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