Refractory Technology With increase in the alumina content, the refractoriness of high alumina refractories Decreases Increases May increase or decrease Remains same Decreases Increases May increase or decrease Remains same ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of Siliceous fireclay Silicon carbide Corrundum Fireclay Siliceous fireclay Silicon carbide Corrundum Fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C. 570 270 70 770 570 270 70 770 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness under load (RUL) is the most important property for the refractory bricks Used in the roof of the furnace At the hearth bottom of the furnace on which stock is placed Used for furnace insulation None of these Used in the roof of the furnace At the hearth bottom of the furnace on which stock is placed Used for furnace insulation None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology The highest melting pure oxide (m.p. > 3000°C) is Alumina Zirconia Thoria Beryllia Alumina Zirconia Thoria Beryllia ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to Fusion under load Thermal spalling Slag attack CO attack Fusion under load Thermal spalling Slag attack CO attack ANSWER DOWNLOAD EXAMIANS APP
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