Refractory Technology Quartz is All of these Transformed to crystoballite on heating above 1470°C Stable form of silica upto 870°C Converted to tridymite on firing between 870 to 1470°C All of these Transformed to crystoballite on heating above 1470°C Stable form of silica upto 870°C Converted to tridymite on firing between 870 to 1470°C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory castables are used for Minimising the number of joints in the structure All of these Patch work Producing monolithic linings Minimising the number of joints in the structure All of these Patch work Producing monolithic linings ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silliminite (Al2O₃.SiO₂) refractory, which is a neutral refractory, is not used in Glass melting furnace Gas retorts Crucibles Pottery furnace Glass melting furnace Gas retorts Crucibles Pottery furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Ramming masses are used for Obtaining monolithic working faces Repairing construction of various furnace parts Neither A nor B Both A & B Obtaining monolithic working faces Repairing construction of various furnace parts Neither A nor B Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Graphite or carbon refractories Exihibit wetting characteristics Are not resistant to corrosion by slag Should be used in neutral or reducing atmosphere Exhibit high shrinkage on thermal treatment Exihibit wetting characteristics Are not resistant to corrosion by slag Should be used in neutral or reducing atmosphere Exhibit high shrinkage on thermal treatment ANSWER DOWNLOAD EXAMIANS APP
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