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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. Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm.

    2. A.
    <1
    B.
    10-100
    C.
    100-200
    D.
    100-1000

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  2. Photochemical smog is formed from automobile exhaust

    3. A.
    by reaction of hydrocarbon & nitric oxide in presence of sunlight.
    B.
    appears only on sunny days.
    C.
    is harmful for crops and trees also besides causing eye irritation & asthma.
    D.
    all (a), (b) & (c)

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  3. Reinglemann chart is used for the measurement of the

    4. A.
    combustibles present in automobile exhaust.
    B.
    smoke density from a chimey.
    C.
    exhaust gas density.
    D.
    flue gas temperature.

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  4. Disinfection of water is done to remove

    5. A.
    color
    B.
    bad taste
    C.
    foul odour
    D.
    bacteria

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  5. Which of the following fine dust removal equipments is the most efficient ?

    6. A.
    Bag filter
    B.
    Scrubber
    C.
    Electrostatic precipitator
    D.
    Cyclone separator

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  6. Which of the following industries discharge mercury as a pollutant ?

    7. A.
    Chloro-alkali industry
    B.
    Tanneries
    C.
    Beverage plant
    D.
    Phosphoric acid plant

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  7. Threshold limit value (TLV) of CO in air is __________ ppm.

    8. A.
    5
    B.
    50
    C.
    2000
    D.
    5000

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  8. Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes

    9. A.
    paralysis of muscles & loss of appetite.
    B.
    nervous depression.
    C.
    gastritis & diarrhea.
    D.
    all (a), (b) and (c).

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  9. Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by

    10. A.
    chemical coagulation
    B.
    floatation & skimming
    C.
    centrifugation
    D.
    ultrafiltration

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  10. In large thermal power stations very fine particulates present in flue gas are removed by

    11. A.
    wet scrubber
    B.
    bag filter
    C.
    electrostatic precipitators
    D.
    dust catcher

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