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Civil Engineering :: Waste Water Engineering

  1. R.M.O. expenses include

  2. A.

     Running expenses

    B.

     Maintenance expenses

    C.

     Operation expenses

    D.

     All the above

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  3. 15 cumecs, the depth d and width are related by For drains up to

  4. A.

     d = 0.2 B

    B.

     d = 0.5 B

    C.

     B = 0.2 d

    D.

     B = 0.5 d

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  5. The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is

  6. A.

     30 minutes

    B.

     1 hour

    C.

     1 hour and 30 minutes

    D.

     2 hours

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  7. The discharge per unit plan area of a sedimentation tank, is generally called

  8. A.

     Over flow rate

    B.

     Surface loading

    C.

     Over flow velocity

    D.

     All the above

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  9. The recommended detention period for grit chambers is

  10. A.

     1 minute

    B.

     2 minutes

    C.

     3 minutes

    D.

     5 minutes

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  11. Clogging of sewers, is caused due to

  12. A.

     Silting

    B.

     Low discharge

    C.

     Greasy and oily matters

    D.

     All the above

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  13. A rainfall may be classified as acidic if its pH value is less or equal to

  14. A.

     6

    B.

     7

    C.

     5

    D.

     6.5

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  15. In very first stage of decomposition of the organic matter in sewage

  16. A.

     Nitrites are formed

    B.

     Nitrates are formed

    C.

     Carbondioxide is formed

    D.

     Ammonia is formed

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

  18. A.

     A heap

    B.

     Plateau

    C.

     Windrow

    D.

     None of these

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  19. Flocculated particles do not change their

  20. A.

     Size

    B.

     Shape

    C.

     Weight

    D.

     None of these

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