Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Silicon nitride Crystalline magnesia Zirconium sulphate Silicon carbide Silicon nitride Crystalline magnesia Zirconium sulphate Silicon carbide ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Mullite is chemically represented by Al2O₃ . 2SiO₂ 3Al2O₃ . 2SiO₂ 2Al2O₃ . 3SiO₂ Al2O₃ . SiO₂ Al2O₃ . 2SiO₂ 3Al2O₃ . 2SiO₂ 2Al2O₃ . 3SiO₂ Al2O₃ . SiO₂ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum apparent porosity of magnesite bricks is about __________ percent. 58 8 24 44 58 8 24 44 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Insulating refractories should have Low thermal conductivity High porosity Neither A nor B Both A & B Low thermal conductivity High porosity Neither A nor B Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not an acidic refractory? Silica Carbon black High alumina refractory Fireclay Silica Carbon black High alumina refractory Fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one expands on heating? Fireclay bricks Silica bricks Both A & B Neither A nor B Fireclay bricks Silica bricks Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
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