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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. During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?

    2. A.
    Idle running
    B.
    Acceleration
    C.
    Cruising
    D.
    Deaccelaration

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  2. H2S present in gaseous stream can be removed by adsorption on

    3. A.
    silica gel
    B.
    active carbon
    C.
    bog iron
    D.
    limestone powder

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  3. Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes

    4. A.
    blood poisoning.
    B.
    anaemia.
    C.
    nervous system disorder.
    D.
    all (a), (b) & (c).

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  4. Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by

    5. A.
    natural aeration of water stream.
    B.
    photosynthetic action of algae.
    C.
    both (a) & (b).
    D.
    neither (a) nor (b).

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  5. Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to

    6. A.
    Reynold stresses
    B.
    shear forces
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)

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  6. Smoke is produced due to

    7. A.
    insufficient supply of combustion air and insufficient time for combustion.
    B.
    poor quality of fuel and improper mixing of fuel & combustion air.
    C.
    poor design & overloading of furnace.
    D.
    all (a), (b) and (c).

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  7. Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air.

    8. A.
    hydrocarbons
    B.
    hydrogen flouride
    C.
    hydrogen sulphides
    D.
    nitrogen dioxide

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  8. Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO2 in air is __________ ppm.

    9. A.
    5
    B.
    500
    C.
    1000
    D.
    2000

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  9. Main pollutants released from iron & steel industry is

    10. A.
    CO, CO2 & SO2.
    B.
    H2S, NO & SO3.
    C.
    CO2, H2S & NO2.
    D.
    SO3, NO2 & CO2.

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  10. Exposure to chemicals having carcinogenic properties cause

    11. A.
    dermatitis (skin disorder)
    B.
    cancer
    C.
    asphyxiation (suffocation)
    D.
    asthma

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