Refractory Technology With increasing alumina content, the fusion point of high alumina refractories Remains constant Increases May increase or decrease ; depends on its alumina content Decreases Remains constant Increases May increase or decrease ; depends on its alumina content Decreases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except Electrical conductivity Fusion point Thermal conductivity Cost Electrical conductivity Fusion point Thermal conductivity Cost ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Alumina-graphite bricks are used for lining the Continuous casting systems Neither A nor B Slide gate in teeming laddies Both A & B Continuous casting systems Neither A nor B Slide gate in teeming laddies Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Crushing strength of a refractory Decreases with rise in service temperature Increases with rise in service temperature Is unaffected with change in service temperature Decreases with increase in porosity Decreases with rise in service temperature Increases with rise in service temperature Is unaffected with change in service temperature Decreases with increase in porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica between 1470°C and the melting point 1713°C ? None of these Quartz Cristobalite Tridymite None of these Quartz Cristobalite Tridymite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal diffusivity of a refractory brick is high, when its __________ is high. Density Specific heat Thermal conductivity None of these Density Specific heat Thermal conductivity None of these ANSWER DOWNLOAD EXAMIANS APP
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