Refractory Technology __________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold. High thermal conductivity High density Low porosity Non-wetting characteristics High thermal conductivity High density Low porosity Non-wetting characteristics ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay bricks is not used for lining the Bottom of hot metal mixer Cupola Roof of open hearth furnace Gas producer Bottom of hot metal mixer Cupola Roof of open hearth furnace Gas producer ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following does not occur during firing/burning of refractories? Development of stable mineral form Vitrification Removal of water of hydration Decrease in crushing strength Development of stable mineral form Vitrification Removal of water of hydration Decrease in crushing strength ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chromite refractories are Neutral refractory Acidic refractory Basic refractory Fired at a temperature of 600°C only Neutral refractory Acidic refractory Basic refractory Fired at a temperature of 600°C only ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following impurities reduces the refractoriness of magnesite bricks? Al2O₃ CaO All of these SiO₂ Al2O₃ CaO All of these SiO₂ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as __________ percent. 20 15 10 30 20 15 10 30 ANSWER DOWNLOAD EXAMIANS APP
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