Refractory Technology Cold crushing strength of fireclay bricks is about __________ kgf/cm². 100-150 50-100 200-400 500-1000 100-150 50-100 200-400 500-1000 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 Cost Electrical conductivity Thermal conductivity Fusion point Cost Electrical conductivity Thermal conductivity Fusion point ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following bricks should not be used, if the furnace is to be used intermit-tantly? Sillimanite Silicon carbide bricks Silica bricks Firebricks Sillimanite Silicon carbide bricks Silica bricks Firebricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica upto 1470°C ? Quartz Tridymite Cristobalite None of these Quartz Tridymite Cristobalite None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following has the lowest electrical resistivity? Graphite Zircon Fireclay Alumina Graphite Zircon Fireclay Alumina ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Electrical resistor bars are made of Zirconia Alumina Silicon carbide Graphite Zirconia Alumina Silicon carbide Graphite ANSWER DOWNLOAD EXAMIANS APP
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