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Furnace Technology - Section 1 (2)

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Furnace Technology - Section 1

If you are looking for MCQs and other problems based on Furnace
technology then you are at right place, you can find these problems in the following section.

9. 

Coke ovens in steel plant are heated by

A. electricity
B. blast furnace gas/mixed gas
C. coke oven gas
D. both (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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10. 

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

A. emissivity of the refactory walls.
B. size of the furance.
C. use of waste heat recovery equipments.
D. thickness of the stock.

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

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11. 

Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.

A. 20
B. 40
C. 60
D. 80

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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12. 

Low stack loss indicates the

A. use of sub-stoichiometric air for combustion.
B. efficient use of fuel.
C. inefficient use of fuel.
D. oxygen enrichment of combustion air.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

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13. 

Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.

A. 80
B. 130
C. 180
D. 250

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

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14. 

Which of the following is not an additive for flue gases from furnace to reduce its dew-point?

A. Ammonia
B. Fine dolomite
C. Alkaline powders
D. None of these

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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15. 

The reason for excessive clinker formation in gas producers is the

A. use of coal/coke containing a high % of fines and ash.
B. use of fuel having too low an ash fusion temperature.
C. development of hot spots in the fuel bed and an abnormally high rate of gasification.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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16. 

Which of the following is not a directly fired furnace ?

A. By-product coke oven
B. Calcination kiln
C. Sintering furnace
D. Open hearth furnace

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

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