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Chemical Engineering :: Fuels and Combustion

  1. The bright glow of a combustion process is the characteristic of __________ temperature oxidation of coal.

  2. A.
    fast & high
    B.
    slow & low
    C.
    slow & high
    D.
    fast & slow

  3. Net calorific value is the gross calorific value less the __________ heat of water in the product of combustion when cooled to 15°C.

  4. A.
    sensible
    B.
    latent
    C.
    sensible and latent
    D.
    none of these

  5. The catalyst used in shift converter is

  6. A.
    nickel
    B.
    vanadium
    C.
    silica gel
    D.
    alumina

  7. The optimum percentage of excess air for combustion depends upon the __________ of the fuel.

  8. A.
    type (solid, liquid or gaseous)
    B.
    calorific value
    C.
    sulphur content
    D.
    ignition temperature

  9. Fuel for a nuclear reactor (thermal) is

  10. A.
    uranium
    B.
    plutonium
    C.
    radium
    D.
    none of these

  11. "Micum Index" of a coke is a measure of its

  12. A.
    reactivity.
    B.
    porosity.
    C.
    bulk density.
    D.
    hardness & strength.

  13. 'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent.

  14. A.
    2.5
    B.
    7.5
    C.
    10.5
    D.
    14.5

  15. Volatile matter content in coking coal may be about __________ percent.

  16. A.
    1
    B.
    7
    C.
    22
    D.
    46

  17. The main function of primary air in pulverised coal fired burner is to

  18. A.
    burn CO to CO2.
    B.
    dry and transport the coal.
    C.
    have proper combustion by supplying it around the burner.
    D.
    preheat the tertiary air used for complete combustion of CO to CO2.

  19. __________ is used as jet engine fuel.

  20. A.
    Petrol
    B.
    Diesel
    C.
    Kerosene
    D.
    LPG