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Waste Water Engineering problems


  • 1. The layers of vegetable wastes and night soil alternatively piled above the ground to form a mound, is called

  • Options
  • A. a heap
  • B. plateu
  • C. windrow
  • D. none of these.
  • Discuss
  • 2. For sewers, inverted siphon is provided for

  • Options
  • A. one pipe
  • B. two pipes
  • C. three pipes
  • D. four pipes.
  • Discuss
  • 3. If the pH value of sewage is 7

  • Options
  • A. it is acidic
  • B. it is alkaline
  • C. it is neutral
  • D. none of these.
  • Discuss
  • 4. For having central angle ?, the area of cross-section of sewers running partially full, is

  • Options
  • A.
  • B.
  • C.
  • D.
  • Discuss
  • 5. A manhole is generally provided at each

  • Options
  • A. bend
  • B. junction
  • C. change of gradient
  • D. change of sewer diameter
  • E. all the above.
  • Discuss
  • 6. If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is

  • Options
  • A. 1.39 m
  • B. 1.49 m
  • C. 1.59 m
  • D. 1.69 m
  • E. 1.79 m.
  • Discuss
  • 7. Bottom openings 15 cm x 15 cm in the standing baffle wall are provided

  • Options
  • A. 15 cm c/c
  • B. 22.5 cm c/c
  • C. 30 cm c/c
  • D. 50 cm c/c.
  • Discuss
  • 8. The sewer pipes

  • Options
  • A. carry sewage as gravity conduits
  • B. are designed for generating self-cleansing velocities at different discharge
  • C. should resist the wear and tear caused due to abrasion
  • D. all the above.
  • Discuss
  • 9. To maintain aerobic biological activity, the moisture content of the compost mass should be about

  • Options
  • A. 45%
  • B. 50%
  • C. 55%
  • D. 60%.
  • Discuss
  • 10. In very first stage of decomposition of the organic matter in sewage

  • Options
  • A. nitrites are formed
  • B. nitrates are formed
  • C. carbondioxide is formed
  • D. ammonia is formed.
  • Discuss

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