Refractory Technology Quartz is Transformed to crystoballite on heating above 1470°C Converted to tridymite on firing between 870 to 1470°C All of these Stable form of silica upto 870°C Transformed to crystoballite on heating above 1470°C Converted to tridymite on firing between 870 to 1470°C All of these Stable form of silica upto 870°C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not a high alumina refractory material? Periclase Diaspore Kyanite Sillimanite Periclase Diaspore Kyanite Sillimanite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High alumina refractory compared to fireclay bricks have Less load bearing capacity Less resistance to slag attack Low refractoriness High resistance to thermal shock and creep Less load bearing capacity Less resistance to slag attack Low refractoriness High resistance to thermal shock and creep ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology 'Super refractories' are made from pure Oxides Carbides Nitrides Borides Oxides Carbides Nitrides Borides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chrome magnesite is not used in the Wear out lining of steel melting furnaces Inner lining of L.D. converter Aluminium melting furnaces All of these Wear out lining of steel melting furnaces Inner lining of L.D. converter Aluminium melting furnaces All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Natural silica All of these Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Is not stable at high temperature Mainly contains quartz All of these Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Is not stable at high temperature Mainly contains quartz ANSWER DOWNLOAD EXAMIANS APP
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