Refractory Technology Natural silica Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Mainly contains quartz Is not stable at high temperature All of these Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Mainly contains quartz Is not stable at high temperature All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories used in/for __________ should have low thermal conductivity. Muffle furnaces Insulation Coke ovens Regenerators Muffle furnaces Insulation Coke ovens Regenerators ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Sillimanite is a __________ refractory. Insulating Neutral High alumina Basic Insulating Neutral High alumina Basic ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Skull is not formed on the carbon blocks in the hearth of a blast furnace, when it becomes cold, becaus of its High thermal conductivity Non-wetting characteristic None of these High crushing strength High thermal conductivity Non-wetting characteristic None of these High crushing strength ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Firing of refractory brick is done to Form ceramic bonds necessary for development of high crushing strength in the finished product Develop stable mineral forms in them All of these Dehydrate the dried refractory Form ceramic bonds necessary for development of high crushing strength in the finished product Develop stable mineral forms in them All of these Dehydrate the dried refractory ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm² ) is __________ °C. >2000 >1350 1000 500 >2000 >1350 1000 500 ANSWER DOWNLOAD EXAMIANS APP
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