Refractory Technology Refractories used in/for __________ should have low thermal conductivity. Muffle furnaces Insulation Regenerators Coke ovens Muffle furnaces Insulation Regenerators Coke ovens ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following bricks has the most close values of RUL and PCE? Silica bricks Fireclay bricks Tar dolomite bricks High alumina bricks Silica bricks Fireclay bricks Tar dolomite bricks High alumina bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum alumina content in high alumina refractory can be as high as __________ percent. 30 70 90 50 30 70 90 50 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following does not occur during firing/burning of refractories? Decrease in crushing strength Removal of water of hydration Development of stable mineral form Vitrification Decrease in crushing strength Removal of water of hydration Development of stable mineral form Vitrification ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C. 270 70 570 770 270 70 570 770 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica between 1470°C and the melting point 1713°C ? Cristobalite None of these Tridymite Quartz Cristobalite None of these Tridymite Quartz ANSWER DOWNLOAD EXAMIANS APP
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