Refractory Technology Which form of silica has the highest specific gravity? Cristobalite All of these Quartz Tridymite Cristobalite All of these Quartz Tridymite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Presence of MgO in alumino-silicate refractories __________ its refractoriness. Lowers Either A or B; depends on its quantity Increases Does not affect Lowers Either A or B; depends on its quantity Increases Does not affect ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Sillimanite is a __________ refractory. Insulating High alumina Neutral Basic Insulating High alumina Neutral Basic ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology The maximum linear expansion of silica bricks during firing is about __________ percent. 0.5 3.5 1 2 0.5 3.5 1 2 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. 270 570 770 70 270 570 770 70 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories used in/for __________ should have low thermal conductivity. Insulation Muffle furnaces Regenerators Coke ovens Insulation Muffle furnaces Regenerators Coke ovens ANSWER DOWNLOAD EXAMIANS APP
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