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  • Question
  • Check valves are installed


  • Options
  • A. on the delivery side of the pumping set
  • B. at the interconnections between polluted water system and a potable water system
  • C. both (a) and (b)
  • D. neither (a) nor (b).

  • Correct Answer
  • both (a) and (b) 


  • Water Supply Engineering problems


    Search Results


    • 1. Normal values of overflow rate for plain sedimentation tank, is

    • Options
    • A. 250 to 500 litres/hr/m2
    • B. 500 to 750 litres/hr/m2
    • C. 750 to 1000 litres/hr/m2
    • D. 1000 to 1250 litres/hr/m2.
    • Discuss
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. An area is declared drought affected if its mean rainfall is less than

    • Options
    • A. 50%
    • B. 60%
    • C. 75%
    • D. 80%
    • E. 85%.
    • Discuss
    • 7. The standard B.O.D. at 20&Deg;C, is taken for the consumption in

    • Options
    • A. one day
    • B. 2 days
    • C. 3 days
    • D. 4 days
    • E. 5 days.
    • Discuss
    • 8. Quality of water is said to be good if it is

    • Options
    • A. free from suspended matter
    • B. colourless
    • C. free from pathogenic organism
    • D. tasteless
    • E. all the above.
    • Discuss
    • 9. Pick up the correct statement from the following :

    • Options
    • A. The internal pressure within a pipe, is caused due to water head and hammer pressure
    • B. The internal pressure in a pipe running full is equal to vertical ordinate between hydraulic gradient line and centre of the pipe
    • C. In pressure pipes with water at rest, the pressure is equal to water head
    • D. Sudden closure of a valve, causes the water hammer pressure
    • E. All the above.
    • Discuss
    • 10. The main process to purify water by filtration, is

    • Options
    • A. mechanical straining
    • B. flocculation and sedimentation
    • C. biological metabolism
    • D. electronic change
    • E. all the above.
    • Discuss


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