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Chemical Engineering :: Furnace Technology

Furnace Technology - Section 1
Furnace Technology - Section 2
Furnace Technology - Section 3
Furnace Technology - Section 4

  1. The main function of a muffle in the muffle furnace is to

    2. A.
    protect the charge from the effects of the products of combustion.
    B.
    smooth out temperature inequalities on the combustion side of the muffle wall.
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)

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  2. Flue gas outlet temperature from the chimney of any furnace should be ideally about __________ °C.

    3. A.
    50
    B.
    100
    C.
    150
    D.
    250

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  3. Very high pressure boilers are usually __________ boilers.

    4. A.
    fire tube
    B.
    water tube
    C.
    waste heat
    D.
    natural circulation

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  4. Heat transfer rate to the charge/stock in a furnace does not depend upon the

    5. A.
    type of fuels viz solid, liquid or gaseous.
    B.
    flue gas temperature.
    C.
    emissivity of refractory walls.
    D.
    initial temperature of the charged stock.

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  5. Heat balance of furnace provides means of determining the

    6. A.
    thermal efficiency of the process.
    B.
    sources of heat losses.
    C.
    scope of reduction of heat losses.
    D.
    all (a), (b) and (c).

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  6. Thermal efficiency of furnaces can be improved by

    7. A.
    waste heat recovery from flue gas.
    B.
    minimising heat losses from furnace walls.
    C.
    maintaining proper draught.
    D.
    all (a), (b) and (c).

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  7. Shaft furnaces are used for

    8. A.
    smelting
    B.
    calcining
    C.
    roasting
    D.
    all (a), (b) and (c)

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  8. Hearth furnaces are not used for

    9. A.
    roasting
    B.
    melting
    C.
    reheating
    D.
    none of these

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  9. Turn down ratio of a burner

    10. A.
    should be as low as possible i.e., 1 : 2.
    B.
    should be 1:1 for a batch type furnace..
    C.
    is the ratio of maximum to minimum permissible heat input rates.
    D.
    is normally much more for a continuous furnace as compared to a batch furnace.

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  10. Which of the following is not a continuous waste heat recovery equipment from the flue gases going out of furnace ?

    11. A.
    Economiser.
    B.
    Regenerator.
    C.
    Ceramic recuperator.
    D.
    Waste heat boiler.

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