Chemical Engineering - Furnace Technology

Exercise :: Furnace Technology - Section 1

41. 

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:

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42. 

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:

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43. 

Power required in case of forced draught as compared to induced draught (for the same draught produced) is

A. same
B. less
C. more
D. either more or less; depends on the flue gas density

Answer: Option B

Explanation:

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44. 

Means for giving direction to the circulation of gases in furnaces are

A. fans.
B. arrangement of heating stock in the furnaces.
C. location of outlet ports and heating & combustion devices.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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45. 

The amount of combustible escaping uncon-sumed from the furnace, depends upon the

A. air supplied and furnace temperature.
B. burner design (thoroughness of mixing versus stratification).
C. air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction).
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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