Refractory Technology Porosity is induced in insulating refractories by adding Ammonium chloride/sulphate Powdered naphthalene All of these Calcium phosphate Ammonium chloride/sulphate Powdered naphthalene All of these Calcium phosphate ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High porosity refractory bricks have Poor heat conductivity & low strength Poor resistance to the peneration of molten slag, metal & flue gases All of these Better thermal spalling resistance Poor heat conductivity & low strength Poor resistance to the peneration of molten slag, metal & flue gases All of these Better thermal spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one expands on heating? Silica bricks Both A & B Neither A nor B Fireclay bricks Silica bricks Both A & B Neither A nor B Fireclay bricks 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 Insulating bricks Muffles for muffle furnaces Segar cones Crucibles used for melting of high purity metals Insulating bricks Muffles for muffle furnaces Segar cones Crucibles used for melting of high purity metals ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories used in/for __________ should have low thermal conductivity. Regenerators Coke ovens Muffle furnaces Insulation Regenerators Coke ovens Muffle furnaces Insulation ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon bricks are not used in the lining of the Highly chemical resistant equipments Electric furnaces Blast furnace hearth Combustion chamber of blast furnace stoves Highly chemical resistant equipments Electric furnaces Blast furnace hearth Combustion chamber of blast furnace stoves ANSWER DOWNLOAD EXAMIANS APP
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