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 Nuclear reactors, missiles & space crafts Insulation of high temperature furnaces Roof of electric furnaces Hearth of the blast furnace Nuclear reactors, missiles & space crafts Insulation of high temperature furnaces Roof of electric furnaces Hearth of the blast furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Rate of slag attack on refractories increases with rise in temperature due to the Oxidising condition in the furnace Increased thermal conductivity of brick Decreased viscosity of slag None of these Oxidising condition in the furnace Increased thermal conductivity of brick Decreased viscosity of slag None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is required in an insulating refractory? Neither A nor B High thermal conductivity Low porosity Both A & B Neither A nor B High thermal conductivity Low porosity Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With decrease in porosity, the __________ of the refractories decreases. Thermal conductivity Spalling resistance Strength None of these Thermal conductivity Spalling resistance Strength None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks. Fireclay Zirconia Magnesite Silica Fireclay Zirconia Magnesite Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Alumina-graphite bricks are used for lining the Slide gate in teeming laddies Both A & B Continuous casting systems Neither A nor B Slide gate in teeming laddies Both A & B Continuous casting systems Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
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