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Civil Engineering :: Waste Water Engineering

  1. Dry water flow in a combined sewer, is

  2. A.

     Industrial sewage

    B.

     Domestic sewage

    C.

     Storm water

    D.

     Inclusive of domestic and industrial sewage but excludes storm water

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  3. A sewer running partially full and hurried with back filled, fails in compression due to

  4. A.

     Weight of the pipe

    B.

     Weight of the back fill

    C.

     Superimposed traffic loads

    D.

     All the above

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  5. The ratio of design discharge to the surface area of a sedimentation tank is called

  6. A.

     Surface loading

    B.

     Overflow rate

    C.

     Overflow velocity

    D.

     All of these

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  7. The maximum depth of sedimentation tanks, is kept

  8. A.

     3 m

    B.

     3.5 m

    C.

     4 m

    D.

     4.5 m

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  9. Chlorination of water is done for the removal of

  10. A.

     Bacterias

    B.

     Suspended solids

    C.

     Sediments

    D.

     Hardness

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  11. Depletion of ozone layer in the outer atmosphere may cause

  12. A.

     Lung cancer

    B.

     Skin cancer

    C.

     Bronchitis

    D.

     Heart disorder

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  13. For treating the sewage of a large city, you will recommend

  14. A.

     A sedimentation tank and an activated sludge treatment plant

    B.

     A plant consisting of Imhoff tanks with low rate trickling filters

    C.

     Sedimentation tanks with high rate trickling filters

    D.

     None of these

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  15. In sewers the effect of scouring is more on

  16. A.

     Top side

    B.

     Bottom side

    C.

     Horizontal side

    D.

     All sides

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  17. For estimating the peak run off the rational formula Q = 0.0278 KpA was evolved by

  18. A.

     Kinchling

    B.

     Lloyd Davis

    C.

     Frubling

    D.

     All the above

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  19. The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is

  20. A.

     0.05552 cumec

    B.

     0.05554 cumec

    C.

     0.05556 cumec

    D.

     0.0556 cumec

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