Refractory Technology With increase in the alumina content, the refractoriness of high alumina refractories Decreases May increase or decrease Remains same Increases Decreases May increase or decrease Remains same Increases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology 'Super refractories' are made from pure Borides Carbides Nitrides Oxides Borides Carbides Nitrides Oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of Insulating bricks Segar cones Crucibles used for melting of high purity metals Muffles for muffle furnaces Insulating bricks Segar cones Crucibles used for melting of high purity metals Muffles for muffle furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology SiO₂ percentage in firebrick is about 80-85 55-60 35-40 >94 80-85 55-60 35-40 >94 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. 2000 1000 1600 700 2000 1000 1600 700 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to Slag attack Fusion under load CO attack Thermal spalling Slag attack Fusion under load CO attack Thermal spalling ANSWER DOWNLOAD EXAMIANS APP
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