Refractory Technology Electrical resistor bars are made of Silicon carbide Graphite Zirconia Alumina Silicon carbide Graphite Zirconia Alumina ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increasing alumina content, the fusion point of high alumina refractories May increase or decrease ; depends on its alumina content Remains constant Decreases Increases May increase or decrease ; depends on its alumina content Remains constant Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of an acidic refractory material is Not affected by the addition of basic oxides Reduced by the addition of basic oxides Not affected by the addition of basic oxides Increased by the addition of basic oxides Not affected by the addition of basic oxides Reduced by the addition of basic oxides Not affected by the addition of basic oxides Increased by the addition of basic oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Semi-silica bricks compared to silica bricks have Both A & B Less fusion point Neither A nor B Better spalling resistance Both A & B Less fusion point Neither A nor B Better spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica between 1470°C and the melting point 1713°C ? None of these Quartz Tridymite Cristobalite None of these Quartz Tridymite Cristobalite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the density of silica refractories, its Spalling resistance reduces Neither A nor B Resistance to slag attack increases Both A & B Spalling resistance reduces Neither A nor B Resistance to slag attack increases Both A & B ANSWER DOWNLOAD EXAMIANS APP
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