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 Hearth of the blast furnace Roof of electric furnaces Insulation of high temperature furnaces Nuclear reactors, missiles & space crafts Hearth of the blast furnace Roof of electric furnaces Insulation of high temperature furnaces Nuclear reactors, missiles & space crafts ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a high alumina refractory? Dolomite Bauxite Corrundum Mullite Dolomite Bauxite Corrundum Mullite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Highest melting (m.p = 3070°C) oxide refractory is Zirconia Magnesia Alumina Thoria Zirconia Magnesia Alumina Thoria ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except Thermal conductivity Electrical conductivity Cost Fusion point Thermal conductivity Electrical conductivity Cost Fusion point ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns. 2200 2400 1800 2700 2200 2400 1800 2700 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not an acidic refractory? Bauxite bricks Fireclay bricks Silica bricks Magnesia bricks Bauxite bricks Fireclay bricks Silica bricks Magnesia bricks ANSWER DOWNLOAD EXAMIANS APP
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