Refractory Technology Which property of refractories is the most important for top section of the blast furnace? Resistance to abrasion Stability of volume at high temperature Resistance to corrosion by slag Resistance to slag peneration Resistance to abrasion Stability of volume at high temperature Resistance to corrosion by slag Resistance to slag peneration ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica upto 1470°C ? Tridymite None of these Cristobalite Quartz Tridymite None of these Cristobalite Quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which brick undergoes maximum shrinkage on drying? Fireclay bricks Magnesite bricks Tar bonded dolomite bricks Chromite bricks Fireclay bricks Magnesite bricks Tar bonded dolomite bricks Chromite bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is required in an insulating refractory? High thermal conductivity Low porosity Neither A nor B Both A & B High thermal conductivity Low porosity Neither A nor B Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silliminite (Al2O₃.SiO₂) refractory, which is a neutral refractory, is not used in Gas retorts Crucibles Pottery furnace Glass melting furnace Gas retorts Crucibles Pottery furnace Glass melting furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Skull is not formed on the carbon blocks in the hearth of a blast furnace, when it becomes cold, becaus of its High thermal conductivity Non-wetting characteristic High crushing strength None of these High thermal conductivity Non-wetting characteristic High crushing strength None of these ANSWER DOWNLOAD EXAMIANS APP
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