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  • Question

  • In areas where light rains are uniformly distributed throughout the year, the type of sewerage system to be adopted is


  • Options
  • A. separate system
  • B. combined system
  • C. partially combined system
  • D. none of these.

  • Correct Answer
  • combined system 

    • Waste Water Engineering problems

    Search Results

    • 1. The settling velocity of a spherical particle of diameter less than 0.1 mm as per Stock's law, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 2. The grit and silt of the grit chambers, may not be used for

    • Options
    • A. raising low lying areas by dumping
    • B. concreting
    • C. both (a) and (b)
    • D. neither (a) nor (b).
      • Discuss
    • 3. The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be

    • Options
    • A. 0.9 cm
    • B. 1.2 m
    • C. 1.5 m
    • D. > 1.5 m.
      • Discuss
    • 4. For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of

    • Options
    • A. 100 cm
    • B. 120 cm
    • C. 140 cm
    • D. 160 cm
    • E. 180 cm.
      • Discuss
    • 5. Pick up the incorrect size of stone ware sewers

    • Options
    • A. 52.5 cm
    • B. 67.5 cm
    • C. 82.5 cm
    • D. 90 cm
    • E. none of these.
      • Discuss
    • 6. The intensity of rain is expressed in

    • Options
    • A. cm/minute
    • B. cm/hour
    • C. cm/day
    • D. none of these.
      • Discuss
    • 7. The rate of accumulation of sludge per person per year, is

    • Options
    • A. 10 litres
    • B. 15 litres
    • C. 20 litres
    • D. 25 litres
    • E. 30 litres.
      • Discuss
    • 8. The formula used for determining flow velocities in sewers, is known as

    • Options
    • A. Chezy's formula
    • B. Bazin's formula
    • C. Kutter's formula
    • D. Manning's formula.
      • Discuss
    • 9. The most efficient cross section of sewers in a separate sewerage system is

    • Options
    • A. parabolic
    • B. circular
    • C. rectangular
    • D. new egged.
      • Discuss
    • 10. If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is

    • Options
    • A. 100 mg/l
    • B. 200 mg/l
    • C. 300 mg/l
    • D. 400 mg/l.
      • Discuss

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