Refractory Technology __________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold. High thermal conductivity Non-wetting characteristics High density Low porosity High thermal conductivity Non-wetting characteristics High density Low porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to CO attack Fusion under load Thermal spalling Slag attack CO attack Fusion under load Thermal spalling Slag attack ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Rate of slag attack on refractories increases with rise in temperature due to the Decreased viscosity of slag Oxidising condition in the furnace Increased thermal conductivity of brick None of these Decreased viscosity of slag Oxidising condition in the furnace Increased thermal conductivity of brick None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Tar dolomite bricks are used in the All of these Basic Bessemer converter Basic open hearth furnace Electric furnaces All of these Basic Bessemer converter Basic open hearth furnace Electric furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Alumina-graphite bricks are used for lining the Slide gate in teeming laddies Continuous casting systems Both A & B Neither A nor B Slide gate in teeming laddies Continuous casting systems Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of a basic refractory material is Not affected by the addition of acid oxides Increased by the addition of acid oxides Always less than 1000°C Reduced by the addition of acid oxides Not affected by the addition of acid oxides Increased by the addition of acid oxides Always less than 1000°C Reduced by the addition of acid oxides ANSWER DOWNLOAD EXAMIANS APP
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