Refractory Technology Quartz is Converted to tridymite on firing between 870 to 1470°C All of these Stable form of silica upto 870°C Transformed to crystoballite on heating above 1470°C Converted to tridymite on firing between 870 to 1470°C All of these Stable form of silica upto 870°C Transformed to crystoballite on heating above 1470°C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Roof of a basic electric furnace is made of __________ bricks. Silica None of these Superduty fireclay Chromite Silica None of these Superduty fireclay Chromite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With decrease in porosity, the __________ of the refractories decreases. Spalling resistance Thermal conductivity Strength None of these Spalling resistance Thermal conductivity Strength None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks. Magnesite Fireclay Zirconia Silica Magnesite Fireclay Zirconia Silica 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 'Super refractories' are made from pure Nitrides Borides Carbides Oxides Nitrides Borides Carbides Oxides ANSWER DOWNLOAD EXAMIANS APP
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