Refractory Technology Which one expands on heating? Silica bricks Fireclay bricks Neither A nor B Both A & B Silica bricks Fireclay bricks Neither A nor B Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of a basic refractory material is Always less than 1000°C Increased by the addition of acid oxides Reduced by the addition of acid oxides Not affected by the addition of acid oxides Always less than 1000°C Increased by the addition of acid oxides Reduced by the addition of acid oxides Not affected by the addition of acid oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chemically, mullite refractories is ThO₂ 3Al2O₃.2SiO₂ Al2O₃ ZrSO₄ ThO₂ 3Al2O₃.2SiO₂ Al2O₃ ZrSO₄ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the most stable crystalline form of silica at room temperature? Quartz None of these Cristobalite Tridymite Quartz None of these Cristobalite Tridymite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories are generally not used in the Open hearth furnace Electric furnace walls Burning zone of cement kilns Steel melting furnace Open hearth furnace Electric furnace walls Burning zone of cement kilns Steel melting furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the alumina content in firebricks, its fusion point (refractoriness) Decreases Decreases linearly Remains unchanged Increases Decreases Decreases linearly Remains unchanged Increases ANSWER DOWNLOAD EXAMIANS APP
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