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  • Question
  • Pick up the incorrect statement from the following :


  • Options
  • A. Water disinfected with ozone is free from any odour
  • B. Ozone removes bacterias as well as colour and odour
  • C. ozonised water becomes tasteless
  • D. None of these.

  • Correct Answer
  • ozonised water becomes tasteless 


  • Water Supply Engineering problems


    Search Results


    • 1. The formula Q = P - K[1.8T + 32] in which Q is runoff, P is annual rain fall in cm, T is mean annual temperature in centigrades and K is a constant, is known

    • Options
    • A. Justin's formula
    • B. Khosla's formula
    • C. English formula
    • D. Vermule's formula.
    • Discuss
    • 2. Well treated water is generally supplied for

    • Options
    • A. domestic use
    • B. commercial use
    • C. public use
    • D. waste water
    • E. all the above.
    • Discuss
    • 3. Carbonates in water produce

    • Options
    • A. temporary hardness
    • B. permanent hardness
    • C. acidity
    • D. alkanity.
    • Discuss
    • 4. Pick up the wrong nominal internal diameter of cast iron (spun) pipes in mm from the following :

    • Options
    • A. 300
    • B. 400
    • C. 500
    • D. 550
    • E. 600
    • Discuss
    • 5. Pick up the correct statement from the following :

    • Options
    • A. For determination of small colour intensities, tintometer is generally used
    • B. The odour of water sample is generally measured by a term called odour intensity
    • C. The colour of water sample may be detected by Nessler tube
    • D. Specific conductivity of water measures the amount of dissolved salt
    • E. All the above.
    • Discuss
    • 6. A well is considered to be good if it is sunk into

    • Options
    • A. Clay
    • B. Sand
    • C. Coarse gravel
    • D. Silt.
    • Discuss
    • 7. Gravity conduits

    • Options
    • A. carry water under gravity
    • B. follow the hydraulic gradient line
    • C. are carried on trestles in valleys and depressions
    • D. are carried through tunnels in deep cuttings
    • E. All the above.
    • Discuss
    • 8. Hardness of water is caused by

    • Options
    • A. presence of soap lather
    • B. presence of chlorides and sulphates of sodium and potassium
    • C. presence of bicarbonates, sulphates or chlorides of calcium and magnesium
    • D. turbidity.
    • Discuss
    • 9. The ratio of the maximum daily consumption to the average daily demand, is

    • Options
    • A. 1.0
    • B. 1.2
    • C. 1.4
    • D. 1.6
    • E. 1.8
    • Discuss
    • 10. The process of passing water through beds of granular materials, is called

    • Options
    • A. screening
    • B. sedimentation
    • C. filtration
    • D. none of these.
    • Discuss


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