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  • Question
  • In distribution pipes, drain valves are provided at


  • Options
  • A. lower point
  • B. higher point
  • C. junction points
  • D. any where.

  • Correct Answer
  • lower point 


  • Water Supply Engineering problems


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    • 1. The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60° slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level

    • Options
    • A. 1500 m
    • B. 1505 m
    • C. 1475 m
    • D. 1485 m.
    • Discuss
    • 2. Pick up the correct statement from the following :

    • Options
    • A. Excess quantities of iron and manganese in water, cause discolouration of clothes
    • B. Lead and barium salts have toxic effect
    • C. Arsenic and selenium are poisonous to human health
    • D. Higher copper content affects the lungs
    • E. All the above.
    • Discuss
    • 3. Pick up the incorrect statement from the following. The underground sources of water, is from

    • Options
    • A. wells
    • B. springs
    • C. infiltration wells
    • D. storage reservoirs
    • E. none of these.
    • Discuss
    • 4. If V is total consumption of water in litres for a population of N individuals, per capita consumption or water allowance for the water supply Q, is given by

    • Options
    • A.
    • B.
    • C.
    • D. none of these.
    • Discuss
    • 5. The factor affecting per capita demand, is

    • Options
    • A. size of the city
    • B. climatic conditions
    • C. pressure in water mains
    • D. cost of water
    • E. all the above.
    • Discuss
    • 6. Distribution mains of any water supply, is normally designed for its average daily requirement

    • Options
    • A. 100%
    • B. 150%
    • C. 200%
    • D. 225%.
    • Discuss
    • 7. Corrosion of well pipes may not be reduced by

    • Options
    • A. reducing the draw down and the pumping rate
    • B. reducing the flow velocity
    • C. using thicker pipes
    • D. using screens having larger area of openings
    • E. none of these.
    • Discuss
    • 8. In pressure supply mains, water hammer pressure is reduced by providing

    • Options
    • A. sluice valves
    • B. air valves
    • C. pressure relief valves
    • D. none of the these.
    • Discuss
    • 9. Manholes along the mains from the source to a city are provided at 500 m intervals in

    • Options
    • A. steel pipes
    • B. R.C.C. pipes
    • C. hume steel pipes
    • D. all the above.
    • Discuss
    • 10. Average annual rainfall at any station is the average of annual rainfall over a period of

    • Options
    • A. 7 years
    • B. 14 years
    • C. 21 years
    • D. 28 years
    • E. 35 years.
    • Discuss


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