Refractory Technology Which is the stable form of silica between 1470°C and the melting point 1713°C ? None of these Tridymite Quartz Cristobalite None of these Tridymite Quartz Cristobalite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following does not occur during firing/burning of refractories? Removal of water of hydration Decrease in crushing strength Development of stable mineral form Vitrification Removal of water of hydration Decrease in crushing strength Development of stable mineral form Vitrification ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the Washing action of metal Neither A nor B Both A & B Corrosion by layer of slag Washing action of metal Neither A nor B Both A & B Corrosion by layer of slag 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 Impart greater spalling resistance Reduce its shrinkage on heating All of these Enhance the strength of fired refractories Impart greater spalling resistance Reduce its shrinkage on heating ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica upto 1470°C ? Quartz Cristobalite None of these Tridymite Quartz Cristobalite None of these Tridymite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following bricks should not be used, if the furnace is to be used intermit-tantly? Sillimanite Firebricks Silica bricks Silicon carbide bricks Sillimanite Firebricks Silica bricks Silicon carbide bricks ANSWER DOWNLOAD EXAMIANS APP
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