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Chemical Engineering :: Fuels and Combustion

  1. Which of the following is not a by-product fuel?

  2. A.
    Producer gas
    B.
    Blast furnace gas
    C.
    Coke oven gas
    D.
    Refinery gas

  3. Lignite is

  4. A.
    a high rank coal.
    B.
    a coking coal.
    C.
    can be used for gasification and steam generation.
    D.
    a black banded coal which burns with a non-smoky yellowish flame.

  5. Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around __________ percent.

  6. A.
    80 and 97
    B.
    95 and 100
    C.
    40 and 70
    D.
    25 and 97

  7. Naphthalene recovered from coke oven gas is used

  8. A.
    as moisture proof coating on fibres.
    B.
    as moth balls (insecticides).
    C.
    as a fuel in furnaces.
    D.
    for making electrodes.

  9. Method of maintaining fires in furnace during standby periods without undue consumption of fuel is called

  10. A.
    back draughting.
    B.
    banking.
    C.
    under pressurising.
    D.
    none of these.

  11. Quantity of coke produced from metallurgical coal may be around __________ percent.

  12. A.
    30
    B.
    50
    C.
    75
    D.
    95

  13. Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis.

  14. A.
    500
    B.
    750
    C.
    950
    D.
    1100

  15. Out of the following fuels, the difference between gross and net calorific value will be minimum in case of

  16. A.
    coke oven gas
    B.
    water gas
    C.
    natural gas
    D.
    blast furnace gas

  17. Fuel for a fast breeder nuclear reactor is

  18. A.
    plutonium
    B.
    uranium
    C.
    radium
    D.
    neptunium

  19. Which of the following gaseous fuels is likely to have the highest gross calorific value?

  20. A.
    Sewage gas
    B.
    LPG
    C.
    Producer gas
    D.
    Natural gas