Refractory Technology Which is required in an insulating refractory? High thermal conductivity Both A & B Low porosity Neither A nor B High thermal conductivity Both A & B Low porosity Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories used in/for __________ should have low thermal conductivity. Insulation Coke ovens Regenerators Muffle furnaces Insulation Coke ovens Regenerators Muffle furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High porosity refractory bricks have Poor heat conductivity & low strength Poor resistance to the peneration of molten slag, metal & flue gases Better thermal spalling resistance All of these Poor heat conductivity & low strength Poor resistance to the peneration of molten slag, metal & flue gases Better thermal spalling resistance All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology In panel test for spalling resistance, the average face temperature of panel assembly is maintained at __________ °C for 24 hours. 700 1600 2000 1000 700 1600 2000 1000 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology 10 to 30% magnesite is added to chromite to produce chrome-magnesite refractories. Magnesite addition is mainly done to improve the __________ of chromite. Crushing strength Refractoriness Resistance to slag Spalling resistance Crushing strength Refractoriness Resistance to slag Spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness/fusion points of 'superduty' refractories is __________ °C. > 2000 > 1730 1520-1630 1630-1670 > 2000 > 1730 1520-1630 1630-1670 ANSWER DOWNLOAD EXAMIANS APP
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