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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. Sulphur in metallurgical coal

    2. A.
    contributes to its heating value.
    B.
    affects the quality of steel produced as cracks develop on the surface while rolling the steel.
    C.
    both (a) and (b).
    D.
    neither (a) nor (b).

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  2. L.D. converter gas (produced in steel plant) comprises mainly of

    3. A.
    CO (upto 65%) & CO2
    B.
    CO2 & H2
    C.
    CO & O2
    D.
    CO2 & O2

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  3. Main constituents of purified Lurgi gas are

    4. A.
    H2, CmHn & CO2
    B.
    CO, H2 & CH4
    C.
    CO2, O2 & CO
    D.
    N2, H2 & CO2

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  4. Catalyst used in Fischer-Tropsch process is

    5. A.
    nickel
    B.
    zinc oxide
    C.
    alumina
    D.
    thorium oxide

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  5. Which of the following coal gasification processes will produce gas having maximum methane content ?

    6. A.
    Winkler process.
    B.
    Lurgi process.
    C.
    Kopper-Totzek process.
    D.
    All can produce same methane content.

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  6. Which will have the least volatile matter and hence will be the most difficult to ignite?

    7. A.
    Bituminous coal
    B.
    Coke
    C.
    Semi-bituminous coal
    D.
    Aanthracite

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  7. Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around __________ percent.

    8. A.
    4
    B.
    96
    C.
    20
    D.
    40

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  8. As time passes, the calorific value of stored coal

    9. A.
    decreases
    B.
    increases
    C.
    remains unaltered
    D.
    may increase or decrease (depends on the method of storage).

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  9. Stack (chimney) height in a big thermal power plant is dictated by the

    10. A.
    pollution control aspect.
    B.
    draught to be created.
    C.
    limitation of constructional facilities.
    D.
    none of these.

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  10. A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon

    11. A.
    is less liable to spontaneous combustion on storage.
    B.
    is more difficult to ignite and produces a shorter flame.
    C.
    requires smaller combustion space and less secondary air.
    D.
    none of these.

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