Chemical Engineering - Furnace Technology

Exercise :: Furnace Technology - Section 1

16. 

Which of the following is the most suitable for preheating combustion air above 650°C ?

A. Regenerator
B. Metallic recuperator
C. Ceramic recuperator
D. None of these

Answer: Option C

Explanation:

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17. 

Soaking pits are meant for heating steel

A. ingots
B. coils
C. sheets
D. slabs

Answer: Option A

Explanation:

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18. 

The purpose of controlling the furnace atmosphere is to prevent surface attack by

A. oxidation/scaling
B. decarburising
C. sulphur penetration
D. either of the above

Answer: Option D

Explanation:

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19. 

Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.

A. 20
B. 40
C. 65
D. 80

Answer: Option B

Explanation:

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20. 

In producer gas making furnace, steam is added along with air to mainly control the

A. fusion of coal ash & clinker formation.
B. C. V. of producer gas.
C. temperature of producer gas.
D. tar content in producer gas.

Answer: Option A

Explanation:

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