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  • Question

  • 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.

  • Correct Answer
  • it is neutral 

    • Waste Water Engineering problems

    Search Results

    • 1. For sewers, inverted siphon is provided for

    • Options
    • A. one pipe
    • B. two pipes
    • C. three pipes
    • D. four pipes.
      • Discuss
    • 2. 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
    • 3. No treatment of the sewage is given if dilution factor is

    • Options
    • A. less than 150
    • B. between 150 to 200
    • C. between 200 to 300
    • D. between 400 to 500
    • E. more than 500
      • Discuss
    • 4. Pathogens (or pathogentic bacterias) in water may cause

    • Options
    • A. typhoid
    • B. cholera
    • C. dysentery
    • D. infectious hepatitis
    • E. all the above.
      • Discuss
    • 5. For drains up to 15 cumecs, the depth d and width B are related by

    • Options
    • A. d = 0.2 B
    • B. d = 0.5 B
    • C. B = 0.2 d
    • D. B = 0.5 d.
      • Discuss
    • 6. For having central angle ?, the area of cross-section of sewers running partially full, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. 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

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