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 Thermal conductivity Fusion point Electrical conductivity Cost Thermal conductivity Fusion point Electrical conductivity Cost ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology SiO₂ percentage in firebrick is about >94 55-60 35-40 80-85 >94 55-60 35-40 80-85 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories are dried in the None of these Tunnel kilns Rotary kilns Sun None of these Tunnel kilns Rotary kilns Sun ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness/fusion points of 'superduty' refractories is __________ °C. 1520-1630 > 1730 > 2000 1630-1670 1520-1630 > 1730 > 2000 1630-1670 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture? Chemically prepared foam Cork Saw dust Sand Chemically prepared foam Cork Saw dust Sand ANSWER DOWNLOAD EXAMIANS APP
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