Refractory Technology Silica bricks are never used for lining the Roof of open hearth furnace Dome of blast furnace stoves Beehive coke ovens By-product coke ovens Roof of open hearth furnace Dome of blast furnace stoves Beehive coke ovens By-product coke ovens ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Silicon carbide Crystalline magnesia Silicon nitride Zirconium sulphate Silicon carbide Crystalline magnesia Silicon nitride Zirconium sulphate ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome refractories Have better spalling resistance than chrome magnesite refractories Are not at all resistant to the corrosive action of iron oxide Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have very low thermal co-efficient of expansion Have better spalling resistance than chrome magnesite refractories Are not at all resistant to the corrosive action of iron oxide Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have very low thermal co-efficient of expansion 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 Fusion point Cost Thermal conductivity Electrical conductivity Fusion point Cost Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cold crushing strength of fireclay bricks is about __________ kgf/cm². 50-100 200-400 500-1000 100-150 50-100 200-400 500-1000 100-150 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica below 870°C ? None of these Quartz Tridymite Cristobalite None of these Quartz Tridymite Cristobalite ANSWER DOWNLOAD EXAMIANS APP
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