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  • Question
  • For the same draw down in two observations wells at distances r1 and r2, the times after start of pumping are t1 and t2 hours respectively. The relation which holds good is


  • Options
  • A. For the same draw down in two observations wells at distances r1 and r2, the times after start of pu
  • B. For the same draw down in two observations wells at distances r1 and r2, the times after start of pu
  • C. For the same draw down in two observations wells at distances r1 and r2, the times after start of pu
  • D. For the same draw down in two observations wells at distances r1 and r2, the times after start of pu
  • E. none of these.

  • Correct Answer
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  • Water Supply Engineering problems


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    • 1. The valve fitted closely in a recess against an opening in a pipe, is generally

    • Options
    • A. wedge shaped circular disc
    • B. spherical disc
    • C. parallelopiped disc
    • D. conical shaped circular disc.
    • Discuss
    • 2. For calculation of economical diameter D of a pipe in metres for a discharge Q to be pumped in cumecs, Lea suggested the empirical formula

    • Options
    • A. D = 0.22 Q
    • B. D = 1.22 Q
    • C. D = 2.22 Q
    • D. D = 3.22 Q
    • E. D = 1.33 Q.
    • Discuss
    • 3. When gravity and pumping systems of water distribution are adopted, the type of distribution reservoir, is

    • Options
    • A. elevated tank
    • B. ground source reservoir
    • C. intz tank
    • D. stand pipe.
    • Discuss
    • 4. The average domestic consumption under normal conditions in an Indian city per day per person, is

    • Options
    • A. 105 litres
    • B. 115 litres
    • C. 125 litres
    • D. 135 litres
    • E. 150 litres.
    • Discuss
    • 5. An ideal sand for filters should be

    • Options
    • A. free from dirt and other impurities
    • B. uniform in nature and size
    • C. hard and resistant
    • D. all the above.
    • Discuss
    • 6. Water may contain

    • Options
    • A. bicarbonate alkalinity
    • B. carbonate alkalinity
    • C. hydroxide alkalinity
    • D. caustic alkalinity
    • E. all the above.
    • Discuss
    • 7. Higher yield may be expected from

    • Options
    • A. gravity springs
    • B. surface springs
    • C. artesian springs
    • D. all the above.
    • Discuss
    • 8. The level of underground water is called

    • Options
    • A. water level
    • B. water table
    • C. negative level
    • D. invert level.
    • Discuss
    • 9. Rapid gravity filters can remove bacterial impurities up to a maximum of

    • Options
    • A. 50%
    • B. 60%
    • C. 70%
    • D. 80%
    • E. 90%.
    • Discuss
    • 10. m and n are monsoon duration factor and catchment factor respectively. If P is yearly rainfall in cm, runoff can be calculated by

    • Options
    • A. velocity area method
    • B. weir or spillway method
    • C. use of venturi-meter
    • D. using power plant consumption
    • E. none of these.
    • Discuss


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