Refractory Technology Which of the following does not occur during firing/burning of refractories? Decrease in crushing strength Vitrification Development of stable mineral form Removal of water of hydration Decrease in crushing strength Vitrification Development of stable mineral form Removal of water of hydration ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Silicon carbide Zirconium sulphate Silicon nitride Crystalline magnesia Silicon carbide Zirconium sulphate Silicon nitride Crystalline magnesia ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale. Chrome or magnesite Silicon carbide Silica Lowduty fireclay Chrome or magnesite Silicon carbide Silica Lowduty fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not a neutral refractory? Chromite Magnesite Silicon carbide Graphite Chromite Magnesite Silicon carbide Graphite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is required in an insulating refractory? Low porosity Both A & B High thermal conductivity Neither A nor B Low porosity Both A & B High thermal conductivity Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to Fusion under load Thermal spalling Slag attack CO attack Fusion under load Thermal spalling Slag attack CO attack ANSWER DOWNLOAD EXAMIANS APP
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