Refractory Technology Which is the stable form of silica below 870°C ? Tridymite Cristobalite None of these Quartz Tridymite Cristobalite None of these Quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite bricks have poor resistance to attack by __________ slag. Basic Lime None of these Acid Basic Lime None of these Acid ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following has the lowest electrical resistivity? Fireclay Zircon Graphite Alumina Fireclay Zircon Graphite Alumina ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the most stable crystalline form of silica at room temperature? None of these Tridymite Cristobalite Quartz None of these Tridymite Cristobalite Quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories have Low co-efficient of thermal expansion Tendency to expand unduly high during firing Very high cost Poor thermal spalling resistance Low co-efficient of thermal expansion Tendency to expand unduly high during firing Very high cost Poor thermal spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as __________ percent. 10 30 15 20 10 30 15 20 ANSWER DOWNLOAD EXAMIANS APP
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