Refractory Technology Graphite or carbon refractories Are not resistant to corrosion by slag Exhibit high shrinkage on thermal treatment Exihibit wetting characteristics Should be used in neutral or reducing atmosphere Are not resistant to corrosion by slag Exhibit high shrinkage on thermal treatment Exihibit wetting characteristics Should be used in neutral or reducing atmosphere ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity is induced in insulating refractories by adding All of these Ammonium chloride/sulphate Calcium phosphate Powdered naphthalene All of these Ammonium chloride/sulphate Calcium phosphate Powdered naphthalene ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High thermal conductivity of a refractory material is not important, when it is to be used in the Muffle furnace Recuperators Coke oven regenarators Blast furnace Muffle furnace Recuperators Coke oven regenarators Blast furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum apparent porosity of magnesite bricks is about __________ percent. 44 24 58 8 44 24 58 8 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal spalling mainly occurs during __________ of furnaces. Both A & B Neither A nor B Warming up Cooling down Both A & B Neither A nor B Warming up Cooling down ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is required in an insulating refractory? Neither A nor B High thermal conductivity Both A & B Low porosity Neither A nor B High thermal conductivity Both A & B Low porosity ANSWER DOWNLOAD EXAMIANS APP
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