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