Refractory Technology __________ is not a single oxiderefractory. Zirconia Magnesia Silicon carbide None of these Zirconia Magnesia Silicon carbide None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology SiO₂ percentage in firebrick is about >94 35-40 80-85 55-60 >94 35-40 80-85 55-60 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Quartz is Converted to tridymite on firing between 870 to 1470°C Transformed to crystoballite on heating above 1470°C All of these Stable form of silica upto 870°C Converted to tridymite on firing between 870 to 1470°C Transformed to crystoballite on heating above 1470°C All of these Stable form of silica upto 870°C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot face insulating linings of high purity alumina fused mullite are used, where Highly reducing conditions are involved Presence of iron or silica is harmful All of these Very high temperatures are involved Highly reducing conditions are involved Presence of iron or silica is harmful All of these Very high temperatures are involved 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 Cermets are combination of ceramic and metallic materials due to which they have high strength & resistance to high temperature. Cermets are used in the Insulation of high temperature furnaces Hearth of the blast furnace Roof of electric furnaces Nuclear reactors, missiles & space crafts Insulation of high temperature furnaces Hearth of the blast furnace Roof of electric furnaces Nuclear reactors, missiles & space crafts ANSWER DOWNLOAD EXAMIANS APP
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