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Chapter 4 REFRACTORY MATERIALS MCQs

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1. . Silica refractories are not used in:





2. . Si percentage in silica refractories used in the walls of coke oven is about:





3. . Porosity of silica bricks varies from:





4. . Chrome magnesite bricks are:





5. . Alumina-graphite bricks are used for lining the:





6. . Maximum shrinkage in volume during firing of dried refractories may be as high as:





7. . The main raw material for manufacture of silicon carbide refractories is:





8. . Which consumes the maximum tonnage of refractories annually in an integrated steel plant?





9. . Upper portion of hot metal mixer lined with mullite bricks helps in resisting:





10. . Lower part of hot metal mixer is lined with:





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