Refractory Technology With increasing alumina content, the fusion point of high alumina refractories May increase or decrease ; depends on its alumina content Decreases Increases Remains constant May increase or decrease ; depends on its alumina content Decreases Increases Remains constant ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite bricks have poor resistance to attack by __________ slag. None of these Acid Basic Lime None of these Acid Basic Lime ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Si percentage in silica refractories used in the walls of coke oven is about 45 95 80 60 45 95 80 60 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold. Low porosity Non-wetting characteristics High density High thermal conductivity Low porosity Non-wetting characteristics High density High thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is required in an insulating refractory? Low porosity Neither A nor B High thermal conductivity Both A & B Low porosity Neither A nor B High thermal conductivity Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cold crushing strength of ordinary fireclay brick is about 950 kg/cm² . On exposure to a temperature of about 1500°C, its crushing strength may come down to as low as __________ kg/cm² . 65 250 150 450 65 250 150 450 ANSWER DOWNLOAD EXAMIANS APP
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