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  • Question

  • Permanent hardness of water can be removed by


  • Options
  • A. adding alum
  • B. adding lime
  • C. adding chlorine
  • D. boiling
  • E. zeolite process.

  • Correct Answer
  • zeolite process. 

    • Water Supply Engineering problems

    Search Results

    • 1. Filtration of water is done to remove

    • Options
    • A. colour
    • B. odour
    • C. turbidity
    • D. pathogenic bacteria
    • E. all the above.
      • Discuss
    • 2. Pick up the incorrect statement from the following. In take of water supply should

    • Options
    • A. be nearer to the treatment plant
    • B. receive water from purer zone of the source
    • C. be located downstream of waste water disposal point
    • D. remain easily accessible during floods.
      • Discuss
    • 3. Pick up the correct statement from the following :

    • Options
    • A. Head loss in smaller size pipes at equal velocities, is less
    • B. Cost of pumping is less in smaller size pipes
    • C. Cost of smaller pipes is comparatively more
    • D. None of these.
      • Discuss
    • 4. The most ideal disinfectant used for drinking water throughout the world, is

    • Options
    • A. alum
    • B. lime
    • C. chlorine
    • D. nitrogen
    • E. ammonia.
      • Discuss
    • 5. Water is supplied from the source to the treatment plant under gravity in

    • Options
    • A. Calcutta
    • B. Delhi
    • C. Madras
    • D. Bombay.
      • Discuss
    • 6. The U.C. (uniformity coefficient) for the best filter media sand should be

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. 5
    • E. none of these.
      • Discuss
    • 7. Total flow in stream is known

    • Options
    • A. run off
    • B. stream flow
    • C. discharge
    • D. all the above.
      • Discuss
    • 8. Alum is a

    • Options
    • A. coagulant
    • B. flocculant
    • C. catalyst
    • D. disinfectant.
      • Discuss
    • 9. The requirement of water per capita per day, is

    • Options
    • A. 90 litres
    • B. 150 litres
    • C. 250 litres
    • D. 400 litres.
      • Discuss
    • 10. Generally, first portion of a logistic curve for the population growth of a developing city, represents the growth of

    • Options
    • A. increasing
    • B. decreasing
    • C. constant
    • D. all the above.
      • Discuss

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