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.Management Sciences
A. crack when subjected to sudden change of temperature
B. Cannot be used in the dome of hot blast stoves
C. Have lower thermal conductivity than fireclay bricks
D. All A., B. and C.
Related Mcqs:
- Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about ______________ percent?
- A. 5 B. 20 C. 35 D. 55...
- Grog addition in fireclay during brick manufacture is done to_________________?
- A. Reduce its shrinkage on heating B. Impart greater spalling resistance C. Enhance the strength of fired refractories D. All A., B. and C....
- Firing temperature of magnesite bricks is about _____________ °C?
- A. 800-1000 B. 1000-1200 C. 1600-1800 D. 2400-2600...
- Fireclay bricks are not used in the _________________?
- A. Beehive coke oven B. By-product coke oven walls C. Combustion chamber of B.F. stoves D. Coke oven regenerators...
- Magnesite refractories have low resistance to___________________?
- A. Attack by basic slag B. Abrasion C. Disintegration on sudden change of temperature D. Both B. and C....
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