Hamad Refractory Technology 08/12/2021 A. Spalling rate B. Fusion point C. Shrinkage ability D. None of these Related Mcqs: Which of the following has the lowest electrical resistivity ?A. Graphite B. Fireclay C. Alumina D. Zircon... Zircon refractories have__________________?A. Low co-efficient of expansion B. High RUL (1600°C) and refractoriness (> 2000°C) C. High spalling resistance D. All A., B. and C.... Resistance to slag attack of a refractory _____________________?A. Depends on the nature of slag & refractory B. Decreases at higher temperature C. Decreases, if defective joints & cracks exist in the refractory D. All A., B. and C.... Fireclay bricks are used in the___________________?A. Furnaces allowed to cool frequently B. Flues C. Chimney linings D. All A., B. and C.... Spalling tendency of refractories is reduced by increasing its_________________?A. Porosity B. Specific gravity C. Thermal conductivity D. Strength...
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