Chemical Engineering - Furnace Technology

Exercise :: Furnace Technology - Section 1

11. 

In order to maintain a reducing atmosphere in a furnace, it should have

A. no O2 in flue gas
B. CO in flue gas
C. high excess air
D. none of these

Answer: Option B

Explanation:

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12. 

Which is the most thermally efficient furnace ?

A. Reheating furnace
B. Reverberatory furnace
C. Rotary kilns
D. Boiler furnace

Answer: Option D

Explanation:

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13. 

The heat recoverable from flue gases of furnaces depends on the

A. thermal efficiency of furnace.
B. quantity of flue gases.
C. flue gas temperature drop through the furnace.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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14. 

Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.

A. 250
B. 650
C. 850
D. 1000

Answer: Option B

Explanation:

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15. 

Which is a continuous furnace ?

A. Coke ovens
B. Annealing furnace
C. Glass tank furnace
D. None of these

Answer: Option C

Explanation:

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