Refractory Technology Si percentage in silica refractories used in the walls of coke oven is about 45 60 80 95 45 60 80 95 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the alumina content, the refractoriness of high alumina refractories May increase or decrease Decreases Remains same Increases May increase or decrease Decreases Remains same Increases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High density refractory bricks have lower Spalling resistance Fusion point Thermal conductivity Slag penetration resistance Spalling resistance Fusion point Thermal conductivity Slag penetration resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Quartz is Stable form of silica upto 870°C Transformed to crystoballite on heating above 1470°C Converted to tridymite on firing between 870 to 1470°C All of these Stable form of silica upto 870°C Transformed to crystoballite on heating above 1470°C Converted to tridymite on firing between 870 to 1470°C All of these 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. 20 and 80 60 and 40 80 and 20 50 and 50 20 and 80 60 and 40 80 and 20 50 and 50 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a natural insulating material? Vermiculite None of these Diatomaceous earth/kieselgur Asbestos Vermiculite None of these Diatomaceous earth/kieselgur Asbestos ANSWER DOWNLOAD EXAMIANS APP
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