Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Silicon nitride Zirconium sulphate Crystalline magnesia Silicon carbide Silicon nitride Zirconium sulphate Crystalline magnesia Silicon carbide ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology RUL of refractories depends on the All of these Chemical composition Physical structure Presence of impurities like iron & alkali All of these Chemical composition Physical structure Presence of impurities like iron & alkali ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling tendency of refractories is reduced by increasing its Porosity Specific gravity Strength Thermal conductivity Porosity Specific gravity Strength Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology In panel test for spalling resistance, the average face temperature of panel assembly is maintained at __________ °C for 24 hours. 1000 1600 2000 700 1000 1600 2000 700 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome bricks are used in the All of these Reheating furnaces Roof lining of basic open hearth & other basic furnaces Soaking pits All of these Reheating furnaces Roof lining of basic open hearth & other basic furnaces Soaking pits ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Increasing its porosity Making it denser Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion Increasing its porosity Making it denser Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
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