Refractory Technology Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C. 70 570 770 270 70 570 770 270 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Addition of zircon to silica refractory brick improves its Neither A nor B Crushing strength Neither A nor B Resistance to slag attack Neither A nor B Crushing strength Neither A nor B Resistance to slag attack ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of a basic refractory material is Increased by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Reduced by the addition of acid oxides Increased by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Reduced by the addition of acid oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica bricks have low spalling resistance below 600°C, due to its Low refractoriness Very high thermal conductivity High thermal diffusivity High co-efficient of expansion upto this temperature Low refractoriness Very high thermal conductivity High thermal diffusivity High co-efficient of expansion upto this temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High alumina refractories are used in the Dome of blast furnace stoves Electric arc furnace roof Glass melting furnaces All of these Dome of blast furnace stoves Electric arc furnace roof Glass melting furnaces All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology silicon carbide refractories have very low Refractoriness (< 1700°C) Resistance to thermal shock Thermal conductivity None of these Refractoriness (< 1700°C) Resistance to thermal shock Thermal conductivity None of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS