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Chemical Engineering :: Fuels and Combustion

Fuels and Combustion - Section 1
Fuels and Combustion - Section 2
Fuels and Combustion - Section 3
Fuels and Combustion - Section 4
Fuels and Combustion - Section 5
Fuels and Combustion - Section 6
Fuels and Combustion - Section 7
Fuels and Combustion - Section 8
Fuels and Combustion - Section 9
Fuels and Combustion - Section 10

  1. Calorific value of coke oven gas is around __________ Kcal/Nm3.

    2. A.
    900
    B.
    4200
    C.
    7500
    D.
    2000

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  2. Highly caking coals

    3. A.
    produce weak coke.
    B.
    produce strong coke.
    C.
    may damage the coke oven walls during carbonisation.
    D.
    both (b) and (c).

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  3. Main use of hard coke produced by high temperature carbonisation is in the

    4. A.
    iron blast furnace
    B.
    cupola in foundaries
    C.
    sinter making
    D.
    domestic ovens

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  4. Hard pitch is used for making

    5. A.
    pulverised fuel
    B.
    perfumes
    C.
    insecticides
    D.
    plastics

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  5. Supply of excess air for complete combustion of fuel is necessitated to facilitate

    6. A.
    its thorough mixing with air.
    B.
    attainment of chemical equilibrium.
    C.
    attainment of high temperature.
    D.
    none of these.

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  6. Bomb calorimeter can be used to determine the __________ of the coal.

    7. A.
    sulphur content
    B.
    calorific value
    C.
    both(a) & (b)
    D.
    neither (a) nor (b)

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  7. Which of the following is a poisonous fuel gas?

    8. A.
    Coke oven gas
    B.
    Blast furnace gas
    C.
    Natural gas
    D.
    None of these

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  8. In low temperature carbonisation (as compared to high temperature carbonisation) of coal

    9. A.
    ammonia yield is more.
    B.
    aliphatic tar is produced.
    C.
    free carbon in tar is more.
    D.
    all (a), (b) and (c).

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  9. Washing of coal does not reduce its

    10. A.
    S & P content.
    B.
    heating value.
    C.
    fusion point of ash.
    D.
    none of these.

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  10. Coke having higher porosity has

    11. A.
    lower bulk density.
    B.
    lower strength.
    C.
    higher reactivity.
    D.
    all (a), (b) and (c).

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