Refractory Technology Natural silica 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 Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Mainly contains quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High alumina refractory compared to fireclay bricks have Less resistance to slag attack High resistance to thermal shock and creep Low refractoriness Less load bearing capacity Less resistance to slag attack High resistance to thermal shock and creep Low refractoriness Less load bearing capacity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves? High strength and density All of these High refractoriness High resistance to spalling High strength and density All of these High refractoriness High resistance to spalling ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Crushing strength of a refractory Decreases with rise in service temperature Is unaffected with change in service temperature Decreases with increase in porosity Increases with rise in service temperature Decreases with rise in service temperature Is unaffected with change in service temperature Decreases with increase in porosity Increases with rise in service temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High thermal conductivity of a refractory material is not important, when it is to be used in the Blast furnace Recuperators Muffle furnace Coke oven regenarators Blast furnace Recuperators Muffle furnace Coke oven regenarators ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increasing alumina content, the fusion point of high alumina refractories Increases May increase or decrease ; depends on its alumina content Remains constant Decreases Increases May increase or decrease ; depends on its alumina content Remains constant Decreases ANSWER DOWNLOAD EXAMIANS APP
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