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Home Chemical Engineering Furnace Technology Comments

  • Question
  • Protective gas used in the annealing furnace for steel coil comprises of


  • Options
  • A. 95% N2 + 5% H2
  • B. 5% H2 + 9% N2
  • C. 100% CO
  • D. 100 %H2

  • Correct Answer
  • 95% N2 + 5% H2 


  • Furnace Technology problems


    Search Results


    • 1. Reverberatory furnace is used for

    • Options
    • A. roasting/reduction of ores
    • B. annealing steel coil
    • C. heating air
    • D. steel melting
    • Discuss
    • 2. Dampers are located

    • Options
    • A. before the I.D fan
    • B. after the I.D. fan
    • C. near the top of the chimney
    • D. anywhere after the I.D. fan
    • Discuss
    • 3. Regenerators are used for waste heat recovery in

    • Options
    • A. by-product coke ovens
    • B. beehive coke oven
    • C. blast furnace stoves
    • D. soaking pits
    • Discuss
    • 4. Turndown ratio of a burner gives an idea of the __________ in the furnace.

    • Options
    • A. range of fuel firing rates
    • B. volume of the combustion chamber
    • C. maximum heat input rate only
    • D. minimum heat input rate only
    • Discuss
    • 5. Which furnace employs natural draft?

    • Options
    • A. Coke oven
    • B. Boiler
    • C. Rotary kilns
    • D. L.D. converter
    • Discuss
    • 6. Reducing atmosphere is maintained in a

    • Options
    • A. calcination kiln
    • B. blast furnace
    • C. soaking pit
    • D. L.D. converter
    • Discuss
    • 7. Which one shows the diagramatic heat balance in a furnace?

    • Options
    • A. Sankey diagram
    • B. Cox chart
    • C. Ostwald chart
    • D. None of these
    • Discuss
    • 8. Artificial draught produced by a fan in the furnace can be controlled by the

    • Options
    • A. speed of the fan.
    • B. damper.
    • C. variation in the pitch of fan blades.
    • D. all (a), (b) and (c).
    • Discuss
    • 9. Size of the combustion chamber of a furnace depends upon the

    • Options
    • A. heat release rate of the fuel.
    • B. preheat temperature of fuel & air.
    • C. method of mixing the fuel & air.
    • D. all (a), (b) and (c).
    • Discuss
    • 10. Pot furnace which is either regenerative or recupterative, is used in the manufacture of

    • Options
    • A. glass
    • B. stainless steel
    • C. potteries
    • D. refractory bricks.
    • Discuss


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