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Chemical Engineering :: Environmental Engineering

Environmental Engineering - Section 1
Environmental Engineering - Section 2
Environmental Engineering - Section 3
Environmental Engineering - Section 4
Environmental Engineering - Section 5
Environmental Engineering - Section 6
Environmental Engineering - Section 7

  1. Smog is

    2. A.
    nothing but black smoke.
    B.
    a combination of smoke and fog.
    C.
    a liquid particle resulting from vapor condensation.
    D.
    a solid particle e.g. flyash.

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  2. __________ is the process of killing organism in water.

    3. A.
    Coagulation
    B.
    Sterilisation
    C.
    Disinfection
    D.
    Sedimentation

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  3. Reingleman chart No. 2 corresponds to __________ percent black smoke.

    4. A.
    10
    B.
    20
    C.
    40
    D.
    80

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  4. Which of the following is a manmade source of air pollution ?

    5. A.
    Automobile exhaust.
    B.
    Forest fire.
    C.
    Bacterial action in soil and swamp areas
    D.
    All (a), (b) and (c).

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  5. Which is the most efficient dust removal equipment for removal of sub-micronic dust particles from blast furnace gas ?

    6. A.
    Packed scrubber
    B.
    Gravity settling chamber
    C.
    Electrostatic precipitator
    D.
    Hydrocyclone

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  6. Insufficient washing of sand grains in a rapid sand filter causes

    7. A.
    air binding
    B.
    shrinkage of filtering media
    C.
    mud balls
    D.
    expansion of filtering media

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  7. Which of the following sources is responsible for maximum air pollution ?

    8. A.
    Industrial chimney exhaust.
    B.
    Forest fire.
    C.
    Automobiles exhaust.
    D.
    Photochemical oxidation of organic matter.

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  8. Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ?

    9. A.
    Sedimentation tank
    B.
    Circular clarifier
    C.
    Mechanical flocculation
    D.
    Chemical coagulation

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  9. In sewage treatment, its sedimentation is speeded up by commonly adding

    10. A.
    hydrochloric acid.
    B.
    lime.
    C.
    copper sulphate.
    D.
    sodium sulphate.

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  10. Noise level in a quiet private business office is about __________ decibels.

    11. A.
    25
    B.
    50
    C.
    70
    D.
    85

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