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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. Forced recirculation of furnace gases is practised

    2. A.
    to increase heat transfer by convection.
    B.
    to ensure uniform temperature.
    C.
    in furnaces, operating below 750°C.
    D.
    all (a), (b) and (c).

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  2. Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the

    3. A.
    quantity & temperature of waste gas.
    B.
    dust concentration & nature of dust in waste gas.
    C.
    corrosive nature of the waste gas.
    D.
    all (a), (b) and (c).

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  3. Air filtration in a furnace

    4. A.
    reduces its thermal efficiency.
    B.
    is indicated by flame sting out.
    C.
    increases the flue gas temperature.
    D.
    none of these.

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  4. Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing ?

    5. A.
    Ash disposal problem.
    B.
    Excessive fly ash discharge from the stack.
    C.
    Higher power consumption in its transportation.
    D.
    Erosion of induced draft fan blades.

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  5. Which of the following is a periodic furnace?

    6. A.
    Tunnel kiln
    B.
    Rotary kiln
    C.
    Soaking pit
    D.
    Reheating furnace.

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  6. Regenerators are normally provided in the

    7. A.
    glass melting furnace.
    B.
    open hearth furnace.
    C.
    by product coke ovens.
    D.
    all (a), (b) and (c).

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  7. Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures.

    8. A.
    350
    B.
    750
    C.
    1050
    D.
    1250

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  8. Furnace pressure is normally controlled by regulating the

    9. A.
    air pressure
    B.
    fuel gas pressure
    C.
    speed of I.D. fan
    D.
    damper

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  9. An example of indirectly heated furnace is the

    10. A.
    soaking pit
    B.
    muffle furnace
    C.
    reheating furnace
    D.
    none of these

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  10. Specific heating capacity of a furnace is expressed as

    11. A.
    weight heated/hr
    B.
    weight heated/furnace volume
    C.
    weight heated/hr/furnace volume
    D.
    none of these

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