Refractory Technology Fireclay refractories have Very high cost Low co-efficient of thermal expansion Tendency to expand unduly high during firing Poor thermal spalling resistance Very high cost Low co-efficient of thermal expansion Tendency to expand unduly high during firing Poor thermal spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following does not occur during firing/burning of refractories? Development of stable mineral form Decrease in crushing strength Vitrification Removal of water of hydration Development of stable mineral form Decrease in crushing strength Vitrification Removal of water of hydration ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology An indication of degree of firing in silica brick is its Specific gravity RUL Fusion point None of these Specific gravity RUL Fusion point None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High alumina refractories are used in the All of these Dome of blast furnace stoves Glass melting furnaces Electric arc furnace roof All of these Dome of blast furnace stoves Glass melting furnaces Electric arc furnace roof ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica upto 1470°C ? Tridymite Quartz None of these Cristobalite Tridymite Quartz None of these Cristobalite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Vacuum steel degassing units are lined with High alumina bricks Silica bricks Low duty firebricks Graphite blocks High alumina bricks Silica bricks Low duty firebricks Graphite blocks ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS