Refractory Technology Fusion temperature of pure silica (SiO₂) is __________ °C. 2800 1715 2570 1350 2800 1715 2570 1350 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent. 55 90 80 70 55 90 80 70 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology An ideal refractory should have high Shrinkage ability Spalling rate None of these Fusion point Shrinkage ability Spalling rate None of these Fusion point ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of Crucibles used for melting of high purity metals Insulating bricks Segar cones Muffles for muffle furnaces Crucibles used for melting of high purity metals Insulating bricks Segar cones Muffles for muffle furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chromite refractories are Basic refractory Fired at a temperature of 600°C only Neutral refractory Acidic refractory Basic refractory Fired at a temperature of 600°C only Neutral refractory Acidic refractory ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale. Silicon carbide Lowduty fireclay Chrome or magnesite Silica Silicon carbide Lowduty fireclay Chrome or magnesite Silica ANSWER DOWNLOAD EXAMIANS APP
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