Hamad Refractory Technology 08/06/2020 A. Crushing strength B. Resistance to slag attack C. Both A. and B. D. Neither A. nor B. 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... Graphite or carbon refractories______________________?A. Exhibit wetting characteristics B. Should be used in neutral or reducing atmosphere C. Exhibit high shrinkage on thermal treatment D. Are not resistant to corrosion by slag... _____________ is not a single oxide-refractory?A. Zirconia B. Silicon carbide C. Magnesia D. None of these... The main raw material for manufacture of silicon carbide refractories is_________________?A. Corundum B. Carborundum C. Bauxite D. Periclase... Maximum safe working temperature for fireclay bricks is about __________ °C?A. 1150 B. 1300 C. 1450 D. 1550...
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