Refractory Technology Colour of fireclay bricks is Yellow Black None of these Light buff to reddish buff Yellow Black None of these Light buff to reddish buff ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica upto 1470°C ? Tridymite Quartz Cristobalite None of these Tridymite Quartz Cristobalite None of these ANSWER DOWNLOAD EXAMIANS APP
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 Magnesite refractories have low resistance to Disintegration on sudden change of temperature Attack by basic slag Abrasion Both B and C Disintegration on sudden change of temperature Attack by basic slag Abrasion Both B and C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is required in an insulating refractory? Both A & B Neither A nor B High thermal conductivity Low porosity Both A & B Neither A nor B High thermal conductivity Low porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except Fusion point Thermal conductivity Electrical conductivity Cost Fusion point Thermal conductivity Electrical conductivity Cost ANSWER DOWNLOAD EXAMIANS APP
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