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  • Question
  • For non-scouring velocity 5 m/sec, the type of sewers generally preferred to, is


  • Options
  • A. cast iron sewers
  • B. cement concrete sewers
  • C. glazed bricks sewers
  • D. stone ware sewers.

  • Correct Answer
  • glazed bricks sewers 


  • Waste Water Engineering problems


    Search Results


    • 1. In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is

    • Options
    • A. 2.25
    • B. 2.50
    • C. 2.55
    • D. 2.65
    • E. 2.75
    • Discuss
    • 2. In a fully mechanised composting plant, involves

    • Options
    • A. mechanized receipt
    • B. mechanized segregation
    • C. mechanized pulverising of refuse
    • D. all of these.
    • Discuss
    • 3. Assertion (A) : Discharging the effluents from the oxidation ponds just up stream of lakes or reservoirs is undesirable.

      Reason (R) : The discharged algae get settled in the reservoirs and cause anaerobic decomposition and other water qualities.


    • Options
    • A. Both A and R are true and R is the correct explanation of A
    • B. Both A and R are true but R is not a correct explanation of A
    • C. A is true but R is false
    • D. A is false but R is true.
    • Discuss
    • 4. The gas which may cause explosion in sewers, is

    • Options
    • A. carbondioxide
    • B. methane
    • C. ammonia
    • D. carbon monoxide.
    • Discuss
    • 5. The coagulant widely used for sewage treatment, is

    • Options
    • A. alum
    • B. ferric chloride
    • C. ferric sulphate
    • D. chlorinated copperas.
    • Discuss
    • 6. If D is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is

    • Options
    • A. D
    • B. 1.25 D
    • C. 1.5 D
    • D. 1.75 D
    • E. 2 D.
    • Discuss
    • 7. When drainage to sewage ratio is 20, the peak dry weather flow is

    • Options
    • A. 20% of the design discharge
    • B. slightly less than 5% of the design discharge
    • C. slightly more than 5% of the design discharge
    • D. none of these.
    • Discuss
    • 8. A rain sanitary sewer is constructed to carry

    • Options
    • A. sanitary sewage
    • B. storm sewage
    • C. surface water
    • D. ground water
    • E. all the above.
    • Discuss
    • 9. For the COD test of sewage, organic matter is oxidised by K2Cr207 in the presence of

    • Options
    • A. H2SO4
    • B. HNO3
    • C. HCl
    • D. none of these.
    • Discuss
    • 10. The sewage is pumped up

    • Options
    • A. from low lying areas
    • B. from flat areas
    • C. from basements
    • D. across a high ridge
    • E. all the above.
    • Discuss


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