Chemical Engineering - Refractory Technology

16. 

Silica refractories are not used in

A. coke oven walls.
B. beehive coke ovens.
C. dome and upper portion of B.F. stoves.
D. open hearth furnace roof.

Answer: Option B

Explanation:

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17. 

Refractory materials are never used in the construction of

A. segar cones
B. orton cones
C. pressure vessels
D. ovens & retorts

Answer: Option C

Explanation:

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18. 

Segar cones are used for the determination of __________ of refractories.

A. softening temperature
B. spalling resistance
C. electrical conductivity
D. resistance to slag attack

Answer: Option A

Explanation:

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19. 

Fireclay bricks are used in the

A. furnaces allowed to cool frequently
B. flues
C. chimney linings
D. all (a), (b) and (c)

Answer: Option D

Explanation:

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20. 

Carbon refractories have very high

A. wetting characteristics
B. refractoriness
C. thermal conductivity
D. both (b) and (c)

Answer: Option D

Explanation:

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