Refractory Technology Hollow refractory bricks are made by Slip casting Hand moulding Pressing/machine moulding Extrusion Slip casting Hand moulding Pressing/machine moulding Extrusion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica refractories Can not be used in the dome of hot blast stoves Have lower thermal conductivity than fireclay bricks Crack when subjected to sudden change of temperature All of these Can not be used in the dome of hot blast stoves Have lower thermal conductivity than fireclay bricks Crack when subjected to sudden change of temperature All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity is induced in insulating refractories by adding Powdered naphthalene All of these Ammonium chloride/sulphate Calcium phosphate Powdered naphthalene All of these Ammonium chloride/sulphate Calcium phosphate ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following impurities reduces the refractoriness of magnesite bricks? SiO₂ All of these CaO Al2O₃ SiO₂ All of these CaO Al2O₃ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc All of these Are not resistant to the action of basic slags Shrink during firing Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc All of these Are not resistant to the action of basic slags Shrink during firing ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Skull is not formed on the carbon blocks in the hearth of a blast furnace, when it becomes cold, becaus of its High crushing strength High thermal conductivity None of these Non-wetting characteristic High crushing strength High thermal conductivity None of these Non-wetting characteristic ANSWER DOWNLOAD EXAMIANS APP
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