Refractory Technology With increasing alumina content, the fusion point of high alumina refractories May increase or decrease ; depends on its alumina content Decreases Remains constant Increases May increase or decrease ; depends on its alumina content Decreases Remains constant Increases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Graphite or carbon refractories Exhibit high shrinkage on thermal treatment Should be used in neutral or reducing atmosphere Exihibit wetting characteristics Are not resistant to corrosion by slag Exhibit high shrinkage on thermal treatment Should be used in neutral or reducing atmosphere Exihibit wetting characteristics Are not resistant to corrosion by slag ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Grog addition in fireclay during brick manufacture is done to Reduce its shrinkage on heating All of these Impart greater spalling resistance Enhance the strength of fired refractories Reduce its shrinkage on heating All of these Impart greater spalling resistance Enhance the strength of fired refractories ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal conductivity of refractory bricks Increases with the amount of air entrapped in pores Increases with decrease in porosity Decreases with decreases in porosity Is independent of its porosity and is maximum for insulating bricks Increases with the amount of air entrapped in pores Increases with decrease in porosity Decreases with decreases in porosity Is independent of its porosity and is maximum for insulating bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent. 80 90 70 55 80 90 70 55 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves? High resistance to spalling High refractoriness High strength and density All of these High resistance to spalling High refractoriness High strength and density All of these ANSWER DOWNLOAD EXAMIANS APP
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