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Water Supply Engineering problems

  • 1. While determining the yield of open wells by the pumping test

  • Options
  • A. velocity of recharging water, increases with depression head
  • B. depression head resulting at critical velocity, is called critical depression head
  • C. working head is generally limited to rd of the critical depression head
  • D. maximum safe yield of an open well, is expected at critical depression head.
    • Discuss
  • 2. The maximum hourly consumption, is generally taken as

  • Options
  • A. 110%
  • B. 120%
  • C. 130%
  • D. 140%
  • E. 150%.
    • Discuss
  • 3. A water channel supported above the ground over trestles, is generally called

  • Options
  • A. flume
  • B. canal
  • C. adueduct
  • D. tunnel
  • E. all the above.
    • Discuss
  • 4. If intensity of rainfall in cm per hour is I, percentage coefficient of run-off is P, area of catchment in square kilometres is A, the total run-off Q, is given by

  • Options
  • A. Q = 1.758 x 102 x API
  • B. Q = 2.758 x 102 x API
  • C. Q = 2.758 x 103 x API
  • D.
  • E.
    • Discuss
  • 5. The superimposed load transmitted to the pipe, is generally evaluated by Bousiness formula

  • Options
  • A.
  • B.
  • C.
  • D.
    • Discuss
  • 6. If G is the specific gravity of particles of diameter d, the velocity of settlement V in still water at T°C, according to Stoke's law, is

  • Options
  • A.
  • B.
  • C.
  • D.
  • E. none of these.
    • Discuss
  • 7. The best quality of filter material is obtained from quartzite if it does not loose weight when placed in hydro-chloric acid for 24 hours, more than

  • Options
  • A. 5%
  • B. 8%
  • C. 10%
  • D. 12%
  • E. 15%.
    • Discuss
  • 8. The main disadvantage of hard water, is

  • Options
  • A. greater soap consumption
  • B. scaling of boilers
  • C. corrosion and incrustation of pipes
  • D. making food tasteless
  • E. all the above.
    • Discuss
  • 9. Pick up the correct statement from the following :

  • Options
  • A. A hydrograph is a plot of discharge versus time
  • B. A mass curve is a plot of accumulated flow versus time
  • C. The mass curve continuously rises
  • D. The slope of the mass curve at any time is a measure of the inflow rate at that time
  • E. All the above.
    • Discuss
  • 10. If d is the diameter of the pipe, p is the total internal pressure, f is the permissible tensile stress and n is the effective of the joint, the thickness t of metal pipe, is

  • Options
  • A.
  • B.
  • C.
  • D.
  • E. none of these.
    • Discuss

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