Chemical Engineering - Refractory Technology
Exercise :: Refractory Technology - Section 2
| 21. |
Maximum water percentage in refractory mix meant for hand moulding may be as high as __________ percent. |
Answer: Option D
Explanation:
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| 22. |
Fireclay bricks are never used in the |
| A. |
beehive oven | | B. |
coke oven walls | | C. |
zinc roaster | | D. |
lead blast furnace |
Answer: Option B
Explanation:
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| 23. |
With increasing alumina content, the fusion point of high alumina refractories |
| A. |
increases. | | B. |
decreases. | | C. |
remains constant. | | D. |
may increase or decrease ; depends on its alumina content. |
Answer: Option A
Explanation:
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| 24. |
Chrome magnesite bricks are used in the |
| A. |
side walls of soaking pits and arc furnaces. | | B. |
copper melting furnaces & converters. | | C. |
burner block of glass tanks. | | D. |
all (a), (b) and (c) |
Answer: Option D
Explanation:
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| 25. |
Machine moulding of dry mixture of refractories requires a pressure of the order of __________ kg/cm2. |
Answer: Option D
Explanation:
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