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  • Question

  • The minimum diameter of a sewer is kept


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

  • Correct Answer
  • 15 cm 

    • Waste Water Engineering problems

    Search Results

    • 1.  rd or th extra space is left in sewer pipes at maximum discharge for

    • Options
    • A. low estimates of the average and maximum flows
    • B. large scale infiltration of storm water
    • C. unexpected increase in population
    • D. all the above.
      • Discuss
    • 2. Antisyphonage pipe is fitted

    • Options
    • A. at the end of septic tanks
    • B. on manholes
    • C. with a W.C. trap
    • D. at the beginning of sewer line.
      • Discuss
    • 3. The rational formula for peak drainage discharge, was evolved by

    • Options
    • A. Fruhling
    • B. Lloyd David
    • C. Kuichling
    • D. All of these.
      • Discuss
    • 4. Sewer pipes need be checked for

    • Options
    • A. minimum flow
    • B. maximum flow
    • C. both (a) and (b)
    • D. none of these.
      • Discuss
    • 5. The ratio of design discharge to the surface area of a sedimentation tank is called

    • Options
    • A. surface loading
    • B. overflow rate
    • C. overflow velocity
    • D. all of these.
      • Discuss
    • 6. The minimum diameter of sewer to be adopted is

    • Options
    • A. 10 cm
    • B. 12.5 cm
    • C. 15 cm
    • D. 25 cm.
      • Discuss
    • 7. In the activated sludge process

    • Options
    • A. aeration is continued till stability
    • B. aeration is done with an admixture of previously aerated sludge
    • C. sludge is activated by constant stirring
    • D. water is removed by centrifugal action.
      • Discuss
    • 8. Drop manholes are the manholes

    • Options
    • A. without entry ladders
    • B. without manhole covers
    • C. with depths more than 3.5 m
    • D. having drains at different levels.
      • Discuss
    • 9. The suitable cross-section of sewers to carry combined flow, is

    • Options
    • A. circular
    • B. egg shaped
    • C. rectangular
    • D. horse shoe shaped.
      • Discuss
    • 10. The sewerage system consists of

    • Options
    • A. house sewer
    • B. lateral sewer
    • C. branch sewer
    • D. main sewer
    • E. all of these.
      • Discuss

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