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Waste Water Engineering problems

  • 1. In sewers designed with self cleansing velocity,

  • Options
  • A. the bottom is silted
  • B. the bottom is scoured
  • C. both silting and scouring occur at the bottom
  • D. neither silting nor scouring occurs at the bottom.
    • Discuss
  • 2. In a sedimentation tank (length L, width B, depth D) the settling velocity of a particle for a discharge Q, is

  • Options
  • A.
  • B.
  • C.
  • D.
    • Discuss
  • 3. Hume steel pipes are

  • Options
  • A. steel pipes
  • B. R.C.C. pipes
  • C. steel shell coated from inside with cement mortar
  • D. steel shell coated from outside with cement mortar
  • E. both (c) and (d).
    • Discuss
  • 4. 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
  • 5. Sewer pipes need be checked for

  • Options
  • A. minimum flow
  • B. maximum flow
  • C. both (a) and (b)
  • D. none of these.
    • Discuss
  • 6. The rational formula for peak drainage discharge, was evolved by

  • Options
  • A. Fruhling
  • B. Lloyd David
  • C. Kuichling
  • D. All of these.
    • Discuss
  • 7. 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
  • 8. Civil Engineering Waste Water Engineering: rd or rd or Civil Engineering Waste Water Engineering: 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
  • 9. The minimum diameter of a sewer is kept

  • Options
  • A. 10 cm
  • B. 15 cm
  • C. 20 cm
  • D. 25 cm
  • E. 30 cm.
    • Discuss
  • 10. The minimum diameter of sewer to be adopted is

  • Options
  • A. 10 cm
  • B. 12.5 cm
  • C. 15 cm
  • D. 25 cm.
    • Discuss

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