Refractory Technology Which is the stable form of silica below 870°C ? Tridymite Cristobalite Quartz None of these Tridymite Cristobalite Quartz None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory bricks having lower porosity have Low heat capacity Low thermal conductivity Greater strength High insulating properties Low heat capacity Low thermal conductivity Greater strength High insulating properties ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With decrease in porosity, the __________ of the refractories decreases. Strength Thermal conductivity None of these Spalling resistance Strength Thermal conductivity None of these Spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pyrometric cone equivalent (PCE) of a refractory is the measure of its Resistance to slag penetration Spalling resistance Fusion point Resistance to carbon monoxide attack Resistance to slag penetration Spalling resistance Fusion point Resistance to carbon monoxide attack ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one contains maximum percentage of Al2O₃ ? Aluminous firebrick Sillimanite Firebrick Magnesite Aluminous firebrick Sillimanite Firebrick Magnesite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except Electrical conductivity Cost Fusion point Thermal conductivity Electrical conductivity Cost Fusion point Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
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