Refractory Technology SiO₂ percentage in firebrick is about 80-85 55-60 35-40 >94 80-85 55-60 35-40 >94 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Electrical resistor bars are made of Alumina Zirconia Silicon carbide Graphite Alumina Zirconia Silicon carbide Graphite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Mullite is chemically represented by Al2O₃ . 2SiO₂ 2Al2O₃ . 3SiO₂ Al2O₃ . SiO₂ 3Al2O₃ . 2SiO₂ Al2O₃ . 2SiO₂ 2Al2O₃ . 3SiO₂ Al2O₃ . SiO₂ 3Al2O₃ . 2SiO₂ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Insulating refractories should have Neither A nor B High porosity Both A & B Low thermal conductivity Neither A nor B High porosity Both A & B Low thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories All of these Shrink during firing Are not resistant to the action of basic slags Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc All of these Shrink during firing Are not resistant to the action of basic slags 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 __________ bricks are used in the burning zone of a cement rotary kiln. High alumina Silicon carbide Fireclay Thoria High alumina Silicon carbide Fireclay Thoria ANSWER DOWNLOAD EXAMIANS APP
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