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  • Question

  • 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.

  • Correct Answer
  • all the above. 

    • Water Supply Engineering problems

    Search Results

    • 1. 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
    • 2. 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
    • 3. The superimposed load transmitted to the pipe, is generally evaluated by Bousiness formula

    • Options
    • A.
    • B.
    • C.
    • D.
      • 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. 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
    • 6. 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
    • 7. 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
    • 8. Pick up the correct statement from the following :

    • Options
    • A. The amount of rainfall in 24 hours, is known as daily rainfall
    • B. The amount of rainfall in one year, is known as annual rainfall
    • C. The rain cycle period in India is taken as 35 years
    • D. The ratio of the actual rainfall in the year to the normal rainfall at a place, is called index of the wetness
    • E. All the above.
      • Discuss
    • 9. If discharge of a pump is 0.16 cumecs, the economic diameter of pipe, is

    • Options
    • A. 0.488 m
    • B. 4.88 cm
    • C. 48.8 cm
    • D. 4.88 m
    • E. none of these.
      • Discuss
    • 10. At the socket and spigot joint,

    • Options
    • A. enlarged end of the pipe is called socket
    • B. normal end of the pipe is called spigot
    • C. spigot is fitted into the socket
    • D. molten lead is used for water proofing
    • E. all the above.
      • Discuss

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