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 Thermal conductivity Fusion point Electrical conductivity Cost Thermal conductivity Fusion point ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory bricks having lower porosity have Greater strength High insulating properties Low thermal conductivity Low heat capacity Greater strength High insulating properties Low thermal conductivity Low heat capacity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which property of refractories is the most important for top section of the blast furnace? Resistance to abrasion Resistance to slag peneration Stability of volume at high temperature Resistance to corrosion by slag Resistance to abrasion Resistance to slag peneration Stability of volume at high temperature Resistance to corrosion by slag ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Alumina-graphite bricks are used for lining the Continuous casting systems Slide gate in teeming laddies Both A & B Neither A nor B Continuous casting systems Slide gate in teeming laddies Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of Crucibles used for melting of high purity metals Segar cones Insulating bricks Muffles for muffle furnaces Crucibles used for melting of high purity metals Segar cones Insulating bricks Muffles for muffle furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Mullite is chemically represented by 3Al2O₃ . 2SiO₂ Al2O₃ . SiO₂ Al2O₃ . 2SiO₂ 2Al2O₃ . 3SiO₂ 3Al2O₃ . 2SiO₂ Al2O₃ . SiO₂ Al2O₃ . 2SiO₂ 2Al2O₃ . 3SiO₂ ANSWER DOWNLOAD EXAMIANS APP
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