Refractory Technology Fireclay refractories All of these Are not resistant to the action of basic slags Shrink during firing Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc All of these Are not resistant to the action of basic slags Shrink during firing Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc 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 density High thermal conductivity Low porosity Non-wetting characteristics High density High thermal conductivity Low porosity Non-wetting characteristics 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 Electrical conductivity Fusion point Thermal conductivity Cost Electrical conductivity Fusion point Thermal conductivity Cost ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Semi-silica bricks compared to silica bricks have Neither A nor B Both A & B Less fusion point Better spalling resistance Neither A nor B Both A & B Less fusion point Better spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Grog Iscrushed firebrick All of these Contains both alumina and silica Is a non-plastic material Iscrushed firebrick All of these Contains both alumina and silica Is a non-plastic material ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Ramming masses are used for Obtaining monolithic working faces Repairing construction of various furnace parts Both A & B Neither A nor B Obtaining monolithic working faces Repairing construction of various furnace parts Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
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