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  • Question
  • In a rapid gravity filter


  • Options
  • A. raw water from the source is supplied
  • B. disinfected raw water is supplied
  • C. raw water passed through coagulation tank is supplied
  • D. none of these.

  • Correct Answer
  • raw water passed through coagulation tank is supplied 


  • Water Supply Engineering problems


    Search Results


    • 1. Surcharge storage zone of a reservoir, is

    • Options
    • A. below dead storage
    • B. between dead storage and useful storage
    • C. above useful storage
    • D. also known as valley storage.
    • Discuss
    • 2. Estimates of a water supply project depends upon the rate of water supply per capita consumption and probable population estimated at the end of the design period of

    • Options
    • A. 5 to 10 years
    • B. 10 to 15 years
    • C. 15 to 20 years
    • D. 20 to 30 years
    • E. 25 years.
    • Discuss
    • 3. Pick up the incorrect statement from the following. The source of surface water is from

    • Options
    • A. streams and rivers
    • B. storage reservoirs
    • C. springs
    • D. ponds and lakes
    • E. none of these.
    • Discuss
    • 4. If P is population of a city in thousands and Q is fire demand in litres per minute, for proper estimate of water, the Empirical formula is suggested by

    • Options
    • A. National Board of fire under-writers
    • B. Freeman
    • C. Kuichling
    • D. None of these.
    • Discuss
    • 5. The storage capacity of a reservoir may be divided into three zones. The lowest zone is

    • Options
    • A. Dead storage
    • B. Useful storage
    • C. Surcharge storage
    • D. None of these.
    • Discuss
    • 6. Surface water may

    • Options
    • A. contain large amount of impurities
    • B. be contaminated by impurities
    • C. contain disease producing bacterias
    • D. all the above.
    • Discuss
    • 7. 135 litres of water per person per day, is provided in

    • Options
    • A. nurses homes
    • B. hostels
    • C. residential schools
    • D. all the above.
    • Discuss
    • 8. The type of joint generally used in cast iron pipes, is

    • Options
    • A. socket and spigot joint
    • B. flanged joint
    • C. dresser coupling joint
    • D. flexible joint
    • E. all the above.
    • Discuss
    • 9. Velocity of flow of water in plain sedimentation water tank, is normally kept

    • Options
    • A. 3 cm/minute
    • B. 10 cm/minute
    • C. 20 cm/minute
    • D. 30 cm/minute
    • E. 40 cm/minute.
    • Discuss
    • 10. Pick up the correct statement from the following :

    • Options
    • A. If ports are closed, the dry intake towers will not have any water
    • B. Even if ports are closed, the wet intake tower will have water filled up to reservoir level
    • C. The dry intake towers are generally constructed with heavier construction to resist buoyant forces
    • D. No buoyant force acts on wet intake towers
    • E. All the above.
    • Discuss


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