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