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  • Question

  • The specific retention is least in case of


  • Options
  • A. Clay
  • B. Sand
  • C. Silt
  • D. Coarse gravel.

  • Correct Answer
  • Coarse gravel. 

    • Water Supply Engineering problems

    Search Results

    • 1. If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is

    • Options
    • A. 1880 kilo litres
    • B. 2880 kilo litres
    • C. 3880 kilo litres
    • D. 4880 kilo litres.
      • Discuss
    • 2. By boiling water, hardness can be removed if it is due to

    • Options
    • A. calcium sulphate
    • B. magnesium sulphate
    • C. calcium nitrate
    • D. calcium bicarbonate
    • E. none of these.
      • Discuss
    • 3. As per IS : 1172-1963, water required per head per day for average domestic purposes, is

    • Options
    • A. 50 litres
    • B. 65 litres
    • C. 85 litres
    • D. 105 litres
    • E. 135 litres.
      • Discuss
    • 4. Q is the discharge from an unconfined tube well with depression head s through its pipe of radius rw. If the radius of influence is R, the length of the required strainer, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. In slow sland filters, the turbidity of raw water can be removed only up to

    • Options
    • A. 60 mg/litre
    • B. 75 mg/litre
    • C. 100 gm/litre
    • D. 150 mg/litre.
      • Discuss
    • 6. B.O.D. of treated water should be

    • Options
    • A. 10 ppm
    • B. 25 ppm
    • C. 20 ppm
    • D. 30 ppm
    • E. Nil.
      • Discuss
    • 7. Acidity in water is caused due to

    • Options
    • A. Mineral acids
    • B. Free CO2
    • C. Iron sulphate
    • D. Aluminium sulphate
    • E. All the above.
      • Discuss
    • 8. Disinfection of drinking water, is done to remove

    • Options
    • A. odour
    • B. bacterias
    • C. turbidity
    • D. colour.
      • Discuss
    • 9. The factor affecting per capita demand, is

    • Options
    • A. size of the city
    • B. climatic conditions
    • C. pressure in water mains
    • D. cost of water
    • E. all the above.
      • Discuss
    • 10. If V is total consumption of water in litres for a population of N individuals, per capita consumption or water allowance for the water supply Q, is given by

    • Options
    • A.
    • B.
    • C.
    • D. none of these.
      • Discuss

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