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Home Civil Engineering Water Supply Engineering Comments

  • Question
  • Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be


  • Options
  • A. nil
  • B. 5
  • C. 10
  • D. 15
  • E. 20

  • Correct Answer
  • nil 


  • Water Supply Engineering problems


    Search Results


    • 1. Water supply system includes

    • Options
    • A. digging a well for water
    • B. construction of dams
    • C. construction of canals
    • D. entire arrangement from source to distribution.
    • Discuss
    • 2. Most satisfactory formula for an estimate of fire demand Q for a city of population P in thousands for Indian conditions, is

    • Options
    • A.
    • B. Q = 1640 P (1 - 0.01 P)
    • C. Q = 3180 P
    • D. none of these.
    • Discuss
    • 3. The transitional middle portion of a logistic curve follows

    • Options
    • A. a geometric growth
    • B. a logarithmic growth
    • C. a first over curve
    • D. a constant rate.
    • Discuss
    • 4. The least thickness of class B cast iron (spun) pipe, is

    • Options
    • A. 7.2 mm
    • B. 7.9 mm
    • C. 8.6 mm
    • D. 10 mm.
    • Discuss
    • 5. The population growth curve is

    • Options
    • A. S-shaped curve
    • B. parabolic curve
    • C. circular curve
    • D. straight line
    • E. none of these.
    • Discuss
    • 6. Turbidity of raw water is a measure of

    • Options
    • A. suspended solids
    • B. acidity of water
    • C. B.O.D.
    • D. none of these.
    • Discuss
    • 7. The fire demand of a city may be worked out by

    • Options
    • A. Kuichling's formula
    • B. Freeman formula
    • C. Under Writers formula
    • D. Bustan's formula
    • E. All the above.
    • Discuss
    • 8. Most commonly used pump for lifting water in water supply mains, is

    • Options
    • A. axialflow pump
    • B. reciprocating pump
    • C. rotary type pump
    • D. centrifugal pumps
    • E. none of these.
    • Discuss
    • 9. Surge tanks are used

    • Options
    • A. for storage water
    • B. to increase the velocity in a pipeline
    • C. as overflow valves
    • D. to guard against water hammer.
    • Discuss
    • 10. Asbestos pipes are

    • Options
    • A. light in weight and easy to transport
    • B. highly resistant to corrosion
    • C. high flexible to accommodate deflection upto 12°
    • D. very much smooth and hydraulically efficient
    • E. all the above.
    • Discuss


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