Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Silicon nitride Zirconium sulphate Silicon carbide Crystalline magnesia Silicon nitride Zirconium sulphate Silicon carbide Crystalline magnesia ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal spalling mainly occurs during __________ of furnaces. Neither A nor B Cooling down Warming up Both A & B Neither A nor B Cooling down Warming up Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is a basic refractory? Silica Fireclay Chrome magnesite None of these Silica Fireclay Chrome magnesite None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractory Does not react with basic slags Has poor electrical conductivity at high temperature Can not be used as an insulator Is produced from baddeleyite Does not react with basic slags Has poor electrical conductivity at high temperature Can not be used as an insulator Is produced from baddeleyite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Lower part of hot metal mixer are lined with __________ bricks. Silica Carborundum Superduty fireclay High alumina Silica Carborundum Superduty fireclay High alumina ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ is not a single oxiderefractory. Silicon carbide Zirconia Magnesia None of these Silicon carbide Zirconia Magnesia None of these ANSWER DOWNLOAD EXAMIANS APP
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