Refractory Technology Quartz is Converted to tridymite on firing between 870 to 1470°C Transformed to crystoballite on heating above 1470°C All of these Stable form of silica upto 870°C Converted to tridymite on firing between 870 to 1470°C Transformed to crystoballite on heating above 1470°C All of these Stable form of silica upto 870°C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Grog addition in fireclay during brick manufacture is done to All of these Enhance the strength of fired refractories Reduce its shrinkage on heating Impart greater spalling resistance All of these Enhance the strength of fired refractories Reduce its shrinkage on heating Impart greater spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Bottom of basic open hearth furnace are constructed of Porous fireclay bricks Dead burnt magnesite ramming mass Silicon carbide bricks Semi-silica bricks Porous fireclay bricks Dead burnt magnesite ramming mass Silicon carbide bricks Semi-silica bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for __________ bricks. Fireclay Dolomite Very low alumina Silica Fireclay Dolomite Very low alumina Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal spalling mainly occurs during __________ of furnaces. Warming up Cooling down Both A & B Neither A nor B Warming up Cooling down Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica below 870°C ? Quartz Tridymite Cristobalite None of these Quartz Tridymite Cristobalite None of these ANSWER DOWNLOAD EXAMIANS APP
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