Refractory Technology Porosity of silica bricks varies from __________ percent. 20 to 30 45 to 60 5 to 10 60 to 75 20 to 30 45 to 60 5 to 10 60 to 75 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory bricks having lower porosity have Low thermal conductivity Greater strength Low heat capacity High insulating properties Low thermal conductivity Greater strength Low heat capacity High insulating properties ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not a neutral refractory? Chromite Graphite Silicon carbide Magnesite Chromite Graphite Silicon carbide Magnesite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Insulating refractories should have Both A & B Low thermal conductivity Neither A nor B High porosity Both A & B Low thermal conductivity Neither A nor B High porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories Are not resistant to the action of basic slags Shrink during firing All of these Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc Are not resistant to the action of basic slags Shrink during firing All of these Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not a high alumina refractory material? Kyanite Diaspore Sillimanite Periclase Kyanite Diaspore Sillimanite Periclase ANSWER DOWNLOAD EXAMIANS APP
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