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Chemical Engineering :: Furnace Technology

  1. Pot furnace which is either regenerative or recupterative, is used in the manufacture of

  2. A.
    glass
    B.
    stainless steel
    C.
    potteries
    D.
    refractory bricks.

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  3. Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace ?

  4. A.
    Increase in calorific value of the fuel.
    B.
    Increase in flame temperature.
    C.
    Reduction in scale losses.
    D.
    Saving in fuel consumption.

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  5. A refractory wall separating the stock and the source of heat is provided in a

  6. A.
    updraft kiln
    B.
    muffle furnace
    C.
    continuous furnace
    D.
    none of these

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  7. Which one shows the diagramatic heat balance in a furnace ?

  8. A.
    Sankey diagram
    B.
    Cox chart
    C.
    Ostwald chart
    D.
    None of these

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  9. Decarburisation of steel

  10. A.
    is the removal of carbon from iron carbide (Fe3C).
    B.
    affects its crystalline structure.
    C.
    is favoured by CO2.
    D.
    all (a), (b) and (c).

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  11. Blast furnace stoves are meant for heating

  12. A.
    air
    B.
    blast furnace gas
    C.
    steam
    D.
    none of these

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  13. Fuel economy in furnaces can be achieved by

  14. A.
    using oxygen enriched combustion air.
    B.
    preheating the combustion air.
    C.
    reducing the heat loss through furnace openings & doors.
    D.
    all (a), (b) and (c).

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  15. Thermal efficiency of an open hearth furnace may be about __________ percent.

  16. A.
    5
    B.
    20
    C.
    50
    D.
    80

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  17. Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.

  18. A.
    < 2
    B.
    < 5
    C.
    < 8
    D.
    < 10

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  19. Which of the following is a rotary furnace?

  20. A.
    Lime kiln
    B.
    Soaking pit
    C.
    Stoves
    D.
    Annealing furnace.

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