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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. The reaction, C + CO2 2CO, taking place during coal gasification is called the __________ reaction.

    2. A.
    Neumann reversal
    B.
    shift conversion
    C.
    Boudouard
    D.
    reduction

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  2. The maximum percentage of CO2 in a flue gas (from a carbonaceous fuel) can be

    3. A.
    21
    B.
    77
    C.
    79
    D.
    29

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  3. A good quality coal should have

    4. A.
    low fusion point of ash
    B.
    high ash content
    C.
    high sulphur
    D.
    none of these

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  4. High amount of sulphur and phosphorous in coke causes

    5. A.
    decrease in its calorific value.
    B.
    increase in its strength.
    C.
    brittleness of steel made by using it.
    D.
    none of these.

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  5. The difference between total carbon and fixed carbon of coal will be minimum in case of

    6. A.
    lignite
    B.
    bituminous coal
    C.
    anthracite
    D.
    high temperature coke (V.M < 0.5%)

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  6. The maximum adiabatic flame temperature is attained, when the fuel is burnt with

    7. A.
    theoretically required amount of air.
    B.
    more than theoretically required amount of air.
    C.
    less than theoretically required amount of air.
    D.
    theoretically required amount of oxygen.

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  7. Grindability index of a coal is 100. It implies that the

    8. A.
    coal can be pulverised with great difficulty.
    B.
    coal can't be pulverised.
    C.
    coal can be easily pulverised.
    D.
    power consumption in grinding the coal will be very high.

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  8. The cooling medium used in dry quenching of coke is

    9. A.
    nitrogen
    B.
    air
    C.
    phenolic water
    D.
    carbon dioxide

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  9. A particular coal is said to be free burning when it

    10. A.
    burns completely.
    B.
    gives smokeless burning.
    C.
    shows little or no fusing action.
    D.
    none of these.

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  10. Gobar gas is produced by the __________ of 'gobar' (cow dung).

    11. A.
    hydrolysis
    B.
    fermentation
    C.
    oxidation
    D.
    dehydration

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