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 Cost Thermal conductivity Electrical conductivity Fusion point Cost Thermal conductivity Electrical conductivity Fusion point ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity is induced in insulating refractories by adding Calcium phosphate Powdered naphthalene Ammonium chloride/sulphate All of these Calcium phosphate Powdered naphthalene Ammonium chloride/sulphate All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for __________ bricks. Dolomite Silica Fireclay Very low alumina Dolomite Silica Fireclay Very low alumina ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories All of these Shrink during firing Are not resistant to the action of basic slags Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc All of these Shrink during firing Are not resistant to the action of basic slags 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 Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant? Rotary lime kiln Ceheating furnace L.D. converter Soaking pits Rotary lime kiln Ceheating furnace L.D. converter Soaking pits ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which property of refractories is the most important for top section of the blast furnace? Resistance to slag peneration Resistance to corrosion by slag Stability of volume at high temperature Resistance to abrasion Resistance to slag peneration Resistance to corrosion by slag Stability of volume at high temperature Resistance to abrasion ANSWER DOWNLOAD EXAMIANS APP
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