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Chemical Engineering :: Furnace Technology

  1. Coke ovens in steel plant are heated by

  2. A.
    electricity
    B.
    blast furnace gas/mixed gas
    C.
    coke oven gas
    D.
    both (b) and (c)

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  3. Power required in case of forced draught as compared to induced draught (for the same draught produced) is

  4. A.
    same
    B.
    less
    C.
    more
    D.
    either more or less; depends on the flue gas density

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  5. Means for giving direction to the circulation of gases in furnaces are

  6. A.
    fans.
    B.
    arrangement of heating stock in the furnaces.
    C.
    location of outlet ports and heating & combustion devices.
    D.
    all (a), (b) and (c).

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  7. The amount of combustible escaping uncon-sumed from the furnace, depends upon the

  8. A.
    air supplied and furnace temperature.
    B.
    burner design (thoroughness of mixing versus stratification).
    C.
    air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction).
    D.
    all (a), (b) and (c).

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  9. __________ is an indirectly heated furnace.

  10. A.
    Open hearth furnace
    B.
    Muffle furnace
    C.
    Soaking pit
    D.
    Reheating furnace

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  11. The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.

  12. A.
    50
    B.
    65
    C.
    85
    D.
    99

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  13. In a muffle furnace, the muffle

  14. A.
    retards the heat transfer.
    B.
    assists in temperature equalisation in the charge.
    C.
    permits the use of controlled atmosphere for the protection of stock.
    D.
    all (a), (b) and (c).

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  15. Which is not a hearth furnace ?

  16. A.
    Glass tank furnace
    B.
    Open hearth furnace
    C.
    Cupola
    D.
    Reheating furnace

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  17. An example of shaft furnace is the

  18. A.
    L.D. converter
    B.
    glass melting tank
    C.
    blast furnace
    D.
    soaking pit

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