Refractory Technology High porosity refractory bricks have All of these Poor heat conductivity & low strength Poor resistance to the peneration of molten slag, metal & flue gases Better thermal spalling resistance All of these Poor heat conductivity & low strength Poor resistance to the peneration of molten slag, metal & flue gases Better thermal spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale. Chrome or magnesite Silicon carbide Silica Lowduty fireclay Chrome or magnesite Silicon carbide Silica Lowduty fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories are dried in the Sun Rotary kilns None of these Tunnel kilns Sun Rotary kilns None of these Tunnel kilns ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent. 80 55 90 70 80 55 90 70 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of an acidic refractory material is Not affected by the addition of basic oxides Reduced by the addition of basic oxides Not affected by the addition of basic oxides Increased by the addition of basic oxides Not affected by the addition of basic oxides Reduced by the addition of basic oxides Not affected by the addition of basic oxides Increased by the addition of basic oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica refractories are not used in Beehive coke ovens Dome and upper portion of B.F. stoves Open hearth furnace roof Coke oven walls Beehive coke ovens Dome and upper portion of B.F. stoves Open hearth furnace roof Coke oven walls ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS