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Chemical Engineering :: Furnace Technology

  1. Test specimen for determination of refractoriness under load (RUL) of a refractory is heated in a

  2. A.
    furnace employing neutral atmosphere.
    B.
    carbon resistance furnace.
    C.
    reducing atmosphere.
    D.
    furnace employing negative pressure.

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  3. Regenerators compared to the recuperators for the same duty

  4. A.
    occupy more space
    B.
    are less costly
    C.
    are of smaller size
    D.
    all (a), (b) and (c)

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  5. Regenerators are used for waste heat recovery in

  6. A.
    by-product coke ovens
    B.
    beehive coke oven
    C.
    blast furnace stoves
    D.
    soaking pits

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  7. Which of the following furnaces will have maximum thermal efficiency ?

  8. A.
    Soaking pits
    B.
    Walking beam reheating furnace
    C.
    Boiler furnace
    D.
    Rotary kilns

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  9. Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an

  10. A.
    blast furnace.
    B.
    steam boiler.
    C.
    salt bath furnace.
    D.
    annealing furnace.

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  11. The heating capacity of muffle furnace depends on the

  12. A.
    surface area & emissivity of the stock.
    B.
    properties of the muffle wall (temperature, area, emissivity).
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)

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  13. Which of the following is a batch furnace ?

  14. A.
    Cupola
    B.
    Reheating furnace
    C.
    Glass tank furnace
    D.
    None of these

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  15. In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the

  16. A.
    Ostwald chart
    B.
    Cox chart
    C.
    Sankey diagram
    D.
    none of these

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  17. Maximum thermal efficiency of boiler may be about __________ percent.

  18. A.
    10
    B.
    25
    C.
    65
    D.
    90

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  19. Rotary kilns are used in the

  20. A.
    calcination of limestone & dolomite.
    B.
    cement manufacture.
    C.
    both (a) and (b).
    D.
    neither (a) nor (6).

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