Refractory Technology Tar bonded dolomite bricks Are used in outer lining of L.D. converters Have poorer hydration resistance than pitch bonded bricks Are stored under controlled temperature & humidity to avoid hydration All of these Are used in outer lining of L.D. converters Have poorer hydration resistance than pitch bonded bricks Are stored under controlled temperature & humidity to avoid hydration All of these 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 Cost Thermal conductivity Fusion point Electrical conductivity Cost Thermal conductivity Fusion point Electrical conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of an acidic refractory material is Increased by the addition of basic oxides Not affected by the addition of basic oxides Reduced by the addition of basic oxides Not affected by the addition of basic oxides Increased by the addition of basic oxides Not affected by the addition of basic oxides Reduced by the addition of basic oxides Not affected by the addition of basic oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Semi-silica bricks compared to silica bricks have Less fusion point Both A & B Neither A nor B Better spalling resistance Less fusion point Both A & B Neither A nor B Better spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following bricks should not be used, if the furnace is to be used intermit-tantly? Firebricks Sillimanite Silica bricks Silicon carbide bricks Firebricks Sillimanite Silica bricks Silicon carbide bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Bauxite calcining rotary kilns are lined with __________ bricks. 85% alumina Corundum Carbon Fireclay 85% alumina Corundum Carbon Fireclay ANSWER DOWNLOAD EXAMIANS APP
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