Refractory Technology Fusion point of a basic refractory material is Reduced by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Increased by the addition of acid oxides Reduced by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Increased by the addition of acid oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum alumina content in high alumina refractory can be as high as __________ percent. 50 30 90 70 50 30 90 70 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves? All of these High refractoriness High resistance to spalling High strength and density All of these High refractoriness High resistance to spalling High strength and density ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not an acidic refractory? Silica Carbon black High alumina refractory Fireclay Silica Carbon black High alumina refractory Fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories Are not resistant to the action of basic slags All of these Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc Shrink during firing Are not resistant to the action of basic slags All of these Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc Shrink during firing ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chrome magnesite bricks are Acidic in nature Having higher RUL than silica bricks Neutral in nature Made by mixing 30% chromite and 70% periclase Acidic in nature Having higher RUL than silica bricks Neutral in nature Made by mixing 30% chromite and 70% periclase ANSWER DOWNLOAD EXAMIANS APP
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