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  • Question
  • Calcination of limestone to produce lime is done in a __________ kiln.


  • Options
  • A. tunnel
  • B. rotary
  • C. vertical shaft
  • D. both (b) and (c)

  • Correct Answer
  • both (b) and (c) 


  • Furnace Technology problems


    Search Results


    • 1. An example of a periodic furnace is the

    • Options
    • A. blast furnace stoves
    • B. blast furnace
    • C. coke oven heating chamber
    • D. rotary kilns
    • Discuss
    • 2. Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by

    • Options
    • A. increasing the draft in the furnace.
    • B. preheating the fuel gas.
    • C. oxygen enrichment of combustion air.
    • D. preheating the combustion air.
    • Discuss
    • 3. Coke ovens in steel plant are heated by

    • Options
    • A. electricity
    • B. blast furnace gas/mixed gas
    • C. coke oven gas
    • D. both (b) and (c)
    • Discuss
    • 4. Which is not a hearth furnace?

    • Options
    • A. Glass tank furnace
    • B. Open hearth furnace
    • C. Cupola
    • D. Reheating furnace
    • Discuss
    • 5. Low stack loss indicates the

    • Options
    • A. use of sub-stoichiometric air for combustion.
    • B. efficient use of fuel.
    • C. inefficient use of fuel.
    • D. oxygen enrichment of combustion air.
    • Discuss
    • 6. Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.

    • Options
    • A. 80
    • B. 130
    • C. 180
    • D. 250
    • Discuss
    • 7. Ostwald charts are meant for

    • Options
    • A. computing the excess/deficiency of combustion air.
    • B. calculation of flue gas temperature.
    • C. computation of flue gas analysis.
    • D. none of these.
    • Discuss
    • 8. The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.

    • Options
    • A. 50
    • B. 65
    • C. 85
    • D. 99
    • Discuss
    • 9. In order to maintain a reducing atmosphere in a furnace, it should have

    • Options
    • A. no O2 in flue gas
    • B. CO in flue gas
    • C. high excess air
    • D. none of these
    • Discuss
    • 10. Fuel used in B.F. stove is

    • Options
    • A. pulverised coal
    • B. furnace oil
    • C. blast furnace gas/mixed gas
    • D. coke oven gas
    • Discuss


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