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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. Blast furnace coke is made from coal by

    2. A.
    low temperature carbonisation.
    B.
    high temperature carbonisation.
    C.
    medium temperature carbonisation.
    D.
    heating the coal in an oven in presence of air.

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  2. Yield of blast furnace gas is about __________ Nm3 /ton of pig iron.

    3. A.
    300
    B.
    2000
    C.
    5000
    D.
    10000

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  3. Coke oven gas is stripped of its H2S and mercaptans content by

    4. A.
    absorption in wash oil.
    B.
    adsorption on bog iron bed.
    C.
    bubbling it through dilute sulphuric acid.
    D.
    adsorption on silica gel.

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  4. In Lurgi coal gasifier,

    5. A.
    coking coals cannot be used.
    B.
    low carbon conversion efficiency is achieved.
    C.
    entrainment of solids is higher.
    D.
    larger quantity of coal can be processed.

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  5. Mineral matter content (M) and ash content (A) in coal are approximately related as

    6. A.
    M = 1.1A
    B.
    M = A
    C.
    M = 1.5A
    D.
    M = 2A

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  6. When steam is passed over coal resulting in the endothermic reaction represent by, C + H2O = CO + H2, it is called the __________ of coal.

    7. A.
    carbonisation
    B.
    oxidation
    C.
    coalification
    D.
    gasification

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  7. Dry air requirement for burning 1 Nm3 of CO to CO2 may be around __________ Nm3.

    8. A.
    2.4
    B.
    1.75
    C.
    0.87
    D.
    11.4

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  8. Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced.

    9. A.
    colour
    B.
    moisture content
    C.
    ash content
    D.
    volatile matter

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  9. Ammonia content in raw coke oven gas is about __________ gm/Nm3.

    10. A.
    1
    B.
    15
    C.
    50
    D.
    100

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  10. Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.

    11. A.
    550
    B.
    750
    C.
    950
    D.
    1150

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