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Chemical Engineering
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Refractory Technology
Comments
Question
Chrome magnesite is not used in the
Options
A. inner lining of L.D. converter.
B. aluminium melting furnaces.
C. wear out lining of steel melting furnaces.
D. all (a), and (b) and (c)
Correct Answer
wear out lining of steel melting furnaces.
Refractory Technology problems
Search Results
1. Conversion of silica mineral to cristobalite is accompanied by reduction in its
Options
A. volume
B. specific gravity
C. both (a) & (b)
D. neither (a) nor (b)
Show Answer
Scratch Pad
Discuss
Correct Answer: specific gravity
2. Tar dolomite bricks are used in the
Options
A. basic Bessemer converter
B. basic open hearth furnace
C. electric furnaces
D. all (a), (b) and (c)
Show Answer
Scratch Pad
Discuss
Correct Answer: all (a), (b) and (c)
3. Which is the stable form of silica upto 1470°C?
Options
A. Quartz
B. Cristobalite
C. Tridymite
D. None of these
Show Answer
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Discuss
Correct Answer: Tridymite
4. Colour of fireclay bricks is
Options
A. light buff to reddish buff
B. yellow
C. black
D. none of these
Show Answer
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Discuss
Correct Answer: light buff to reddish buff
5. Spalling tendency of refractories is reduced by increasing its
Options
A. porosity
B. specific gravity
C. thermal conductivity
D. strength
Show Answer
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Discuss
Correct Answer: porosity
6. Sillimanite is a __________ refractory.
Options
A. basic
B. neutral
C. high alumina
D. insulating
Show Answer
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Discuss
Correct Answer: high alumina
7. The main raw material for manufacture of silicon carbide refractories is
Options
A. corrundum
B. carborundum
C. bauxite
D. periclase
Show Answer
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Discuss
Correct Answer: carborundum
8. High refractorinness of refractory bricks means, that it has a
Options
A. high spalling resistance.
B. low spalling resistance.
C. high resistance to fusion.
D. low porosity.
Show Answer
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Discuss
Correct Answer: high resistance to fusion.
9. Which furnace consumes maximum refractory annually in an integrated steel plant?
Options
A. Soaking pit
B. Blastfurnace
C. L.D. converter
D. Coke ovens
Show Answer
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Discuss
Correct Answer: L.D. converter
10. Carbon refractories have very high
Options
A. wetting characteristics
B. refractoriness
C. thermal conductivity
D. both (b) and (c)
Show Answer
Scratch Pad
Discuss
Correct Answer: both (b) and (c)
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