Refractory Technology Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent. 80 70 55 90 80 70 55 90 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Quartz is Stable form of silica upto 870°C Converted to tridymite on firing between 870 to 1470°C All of these Transformed to crystoballite on heating above 1470°C Stable form of silica upto 870°C Converted to tridymite on firing between 870 to 1470°C All of these Transformed to crystoballite on heating above 1470°C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively. 60 and 40 80 and 20 20 and 80 50 and 50 60 and 40 80 and 20 20 and 80 50 and 50 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is required in an insulating refractory? Both A & B Low porosity High thermal conductivity Neither A nor B Both A & B Low porosity High thermal conductivity Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology The main raw material for manufacture of silicon carbide refractories is Corrundum Carborundum Bauxite Periclase Corrundum Carborundum Bauxite Periclase ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C. 1520 1710 1380 1915 1520 1710 1380 1915 ANSWER DOWNLOAD EXAMIANS APP
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