Refractory Technology Porosity of silica bricks varies from __________ percent. 20 to 30 5 to 10 45 to 60 60 to 75 20 to 30 5 to 10 45 to 60 60 to 75 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of a refractory means its Softening Fracture due to uneven expansion at high temperature Resistancce to compressive loads Resistance to chemical action of gases and molten fluxes Softening Fracture due to uneven expansion at high temperature Resistancce to compressive loads Resistance to chemical action of gases and molten fluxes ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C. 270 70 570 770 270 70 570 770 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum apparent porosity of magnesite bricks is about __________ percent. 8 24 58 44 8 24 58 44 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum alumina content in high alumina refractory can be as high as __________ percent. 30 70 90 50 30 70 90 50 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 Cost Thermal conductivity Electrical conductivity Fusion point Cost Thermal conductivity Electrical conductivity Fusion point ANSWER DOWNLOAD EXAMIANS APP
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