Hamad Refractory Technology 13/07/2021 A. Beehive oven B. Coke oven walls C. Zinc roaster D. Lead blast furnace Related Mcqs: Bauxite calcining rotary kilns are lined with ________________ bricks?A. Fireclay B. Carbon C. 85% alumina D. Corundum... Cermets are combination of ceramic and metallic materials due to which they have high strength & resistance to high temperature. Cermets are used in the_______________?A. Hearth of the blast furnace B. Nuclear reactors, missiles & space crafts C. Insulation of high temperature furnaces D. Roof of electric furnaces... 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 ?A. Cost B. Electrical conductivity C. Thermal conductivity D. Fusion point... Rate of slag attack on refractories increases with rise in temperature due to the___________________?A. Decreased viscosity of slag B. Increased thermal conductivity of brick C. Oxidising condition in the furnace D. None of these... Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for _____________ bricks?A. Fireclay B. Silica C. Dolomite D. Very low alumina...
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