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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.

  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)

  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

  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

  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.

  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)

  13. Which of the following is a batch furnace ?

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

  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

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

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

  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).