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  • Question

  • In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,


  • Options
  • A. is only provided
  • B. is doubled
  • C. is trebled
  • D. is not enough.

  • Correct Answer
  • is doubled 

    • Waste Water Engineering problems

    Search Results

    • 1. The factor responsible for purification of sewage in river is

    • Options
    • A. Hydrology
    • B. Dissolved oxygen in water
    • C. Temperature
    • D. Turbulence
    • E. All the above.
      • Discuss
    • 2. For a circular sewer of diameter D running partially full with central angle ?,

    • Options
    • A.
    • B.
    • C.
    • D.
    • E. all the above.
      • Discuss
    • 3. The small sewers are cleaned by

    • Options
    • A. flushing
    • B. cane rodding
    • C. wooden pills
    • D. none of these.
      • Discuss
    • 4. Pick up the correct statement from the following :

    • Options
    • A. The maximum rate of storm run off is called peak drainage discharge
    • B. Rational method of estimating peak run off, may be used precisely for areas less than 50 hectares
    • C. The period after which the entire area starts contributing to the run off, is called the time of concentration
    • D. The time required by water to reach the outlet of a catchment from the most remote point, is called time of concentration
    • E. All the above.
      • Discuss
    • 5. For providing an Indian type W.C., the R.C.C. slabs in the toilet portion

    • Options
    • A. should be sunk by 20 cm
    • B. should be kept 20 cm above the adjacent portion
    • C. should be sunk by 50 cm
    • D. need not be sunk.
      • Discuss
    • 6. Imhoff cone is used to measure

    • Options
    • A. total organic solids
    • B. total solids
    • C. total in organic solids
    • D. settleable solids.
      • Discuss
    • 7. If q is the average sewage flow from a city of population P, the maximum sewage flow

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. The rainfall at any place may be determined by

    • Options
    • A. its intensity
    • B. its direction
    • C. its frequency
    • D. all the above.
      • Discuss
    • 9. PH value of sludge during alkaline regression stage, is

    • Options
    • A. more than 7
    • B. less than 7
    • C. less than 6
    • D. more than 6.
      • Discuss
    • 10. The average temperature of sewage in India, is

    • Options
    • A. 10°C
    • B. 15°C
    • C. 20°C
    • D. 25°C
    • E. 30°C.
      • Discuss

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