Chemical Engineering - Refractory Technology

16. 

Mullite is chemically represented by

A. Al2O3 . 2SiO2
B. 3Al2O3 . 2SiO2
C. Al2O3 . SiO2
D. 2Al2O3 . 3SiO2

Answer: Option B

Explanation:

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17. 

__________ bricks are used in the burning zone of a cement rotary kiln.

A. High alumina
B. Fireclay
C. Thoria
D. Silicon carbide

Answer: Option A

Explanation:

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18. 

Furnace atmosphere for softening temperature determination of refractories (in which segar cones are placed) should be

A. oxidising
B. neutral
C. either (a) or (b)
D. neither (a) nor (b)

Answer: Option C

Explanation:

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19. 

Roof of a basic open hearth furnace is lined with __________ bricks.

A. silica
B. fireclay
C. dolomite
D. magnesite

Answer: Option A

Explanation:

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20. 

High alumina refractories are used in the

A. dome of blast furnace stoves.
B. electric arc furnace roof.
C. glass melting furnaces.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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