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  • Question
  • 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.

  • Correct Answer
  • increasing 


  • Water Supply Engineering problems


    Search Results


    • 1. The requirement of water per capita per day, is

    • Options
    • A. 90 litres
    • B. 150 litres
    • C. 250 litres
    • D. 400 litres.
    • Discuss
    • 2. Alum is a

    • Options
    • A. coagulant
    • B. flocculant
    • C. catalyst
    • D. disinfectant.
    • Discuss
    • 3. Total flow in stream is known

    • Options
    • A. run off
    • B. stream flow
    • C. discharge
    • D. all the above.
    • Discuss
    • 4. 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
    • 5. Permanent hardness of water can be removed by

    • Options
    • A. adding alum
    • B. adding lime
    • C. adding chlorine
    • D. boiling
    • E. zeolite process.
    • Discuss
    • 6. Pick up the correct statement from the following :

    • Options
    • A. Deposition of calcium carbonate on the inside of the well pipe, causes incrustation of the pipe
    • B. Incrustation of the pipe reduces the discharge
    • C. Acidic waters cause corrosion of the pipes
    • D. Corrosion results due to excessive withdrawal of sand along with water
    • E. All the above.
    • Discuss
    • 7. Pick up the incorrect statement from the following :

    • Options
    • A. Porosity of clay sand soil is 45%
    • B. Porosity of pure sand is 35%
    • C. Porosity of sand stone is up to 15%
    • D. Least porosity is that of granite and quartz
    • E. None of these.
    • Discuss
    • 8. The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form

    • Options
    • A. Mono-chloramine (NHCl)
    • B. Di-chloramine (NH2Cl)
    • C. Nitrogen trichloramine (NCl3)
    • D. All the above.
    • Discuss
    • 9. The ensure proper growth of children's teeth, the quantity of flouride used in water mains, is

    • Options
    • A. 1 mg/litre
    • B. 2 mg/litre
    • C. 3 mg/litre
    • D. 4 mg/litre
    • E. 5 mg/litre.
    • Discuss
    • 10. The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called

    • Options
    • A. Working pressure
    • B. Design pressure
    • C. Test pressure
    • D. Hydrostatic pressure.
    • Discuss


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