Refractory Technology In panel test for spalling resistance, the average face temperature of panel assembly is maintained at __________ °C for 24 hours. 2000 1000 700 1600 2000 1000 700 1600 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Quartz is Stable form of silica upto 870°C All of these Converted to tridymite on firing between 870 to 1470°C Transformed to crystoballite on heating above 1470°C Stable form of silica upto 870°C All of these Converted to tridymite on firing between 870 to 1470°C Transformed to crystoballite on heating above 1470°C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High density refractory bricks have lower Spalling resistance Slag penetration resistance Fusion point Thermal conductivity Spalling resistance Slag penetration resistance Fusion point Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one contains minimum percentage of SiO₂? Firebrick Aluminous firebrick Sillimanite Semi-silica Firebrick Aluminous firebrick Sillimanite Semi-silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cold crushing strength of fireclay bricks is about __________ kgf/cm². 50-100 100-150 500-1000 200-400 50-100 100-150 500-1000 200-400 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cold crushing strength of ordinary fireclay brick is about 950 kg/cm² . On exposure to a temperature of about 1500°C, its crushing strength may come down to as low as __________ kg/cm² . 450 65 250 150 450 65 250 150 ANSWER DOWNLOAD EXAMIANS APP
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