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 Fusion point Electrical conductivity Thermal conductivity Cost Fusion point Electrical conductivity Thermal conductivity Cost ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology SiO₂ percentage in firebrick is about 35-40 55-60 80-85 >94 35-40 55-60 80-85 >94 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories are dried in the None of these Tunnel kilns Sun Rotary kilns None of these Tunnel kilns Sun Rotary kilns ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness/fusion points of 'superduty' refractories is __________ °C. > 1730 1630-1670 1520-1630 > 2000 > 1730 1630-1670 1520-1630 > 2000 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? Cork Chemically prepared foam Saw dust Sand Cork Chemically prepared foam Saw dust Sand ANSWER DOWNLOAD EXAMIANS APP
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