Refractory Technology Cermets are combination of ceramic and metallic materials due to which they have high strength & resistance to high temperature. Cermets are used in the Insulation of high temperature furnaces Nuclear reactors, missiles & space crafts Roof of electric furnaces Hearth of the blast furnace Insulation of high temperature furnaces Nuclear reactors, missiles & space crafts Roof of electric furnaces Hearth of the blast furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is required in an insulating refractory? Neither A nor B Low porosity Both A & B High thermal conductivity Neither A nor B Low porosity Both A & B High thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Tar bonded dolomite bricks All of these Have poorer hydration resistance than pitch bonded bricks Are used in outer lining of L.D. converters Are stored under controlled temperature & humidity to avoid hydration All of these Have poorer hydration resistance than pitch bonded bricks Are used in outer lining of L.D. converters Are stored under controlled temperature & humidity to avoid hydration ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chrome magnesite bricks are Having higher RUL than silica bricks Made by mixing 30% chromite and 70% periclase Neutral in nature Acidic in nature Having higher RUL than silica bricks Made by mixing 30% chromite and 70% periclase Neutral in nature Acidic in nature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories have Tendency to expand unduly high during firing Low co-efficient of thermal expansion Very high cost Poor thermal spalling resistance Tendency to expand unduly high during firing Low co-efficient of thermal expansion Very high cost Poor thermal spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Insulating refractories should have High porosity Neither A nor B Low thermal conductivity Both A & B High porosity Neither A nor B Low thermal conductivity Both A & B ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS