Chemical Engineering - Refractory Technology

11. 

Cold crushing strength of refractories depends upon its

A. composition
B. texture
C. firing temperature
D. all (a), (b) and (c)

Answer: Option D

Explanation:

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12. 

Tar bonded dolomite bricks

A. are stored under controlled temperature & humidity to avoid hydration.
B. are used in outer lining of L.D. converters.
C. have poorer hydration resistance than pitch bonded bricks.
D. all (a), (b) and (c)

Answer: Option D

Explanation:

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13. 

Electrical resistor bars are made of

A. silicon carbide
B. alumina
C. zirconia
D. graphite

Answer: Option A

Explanation:

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14. 

Which is not an alumino-silicate refractory?

A. Fireclay bricks.
B. Mullite bricks.
C. Tar dolomite bricks.
D. High alumina bricks.

Answer: Option C

Explanation:

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15. 

Periclase refractory contains mainly

A. CaO
B. MgO
C. Al2O3
D. SiO2

Answer: Option B

Explanation:

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