Refractory Technology Fusion temperature of pure silica (SiO₂) is __________ °C. 2570 1715 2800 1350 2570 1715 2800 1350 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories have low resistance to Disintegration on sudden change of temperature Abrasion Attack by basic slag Both B and C Disintegration on sudden change of temperature Abrasion Attack by basic slag Both B and C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity of silica bricks varies from __________ percent. 20 to 30 60 to 75 5 to 10 45 to 60 20 to 30 60 to 75 5 to 10 45 to 60 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High alumina refractory compared to fireclay bricks have High resistance to thermal shock and creep Less load bearing capacity Low refractoriness Less resistance to slag attack High resistance to thermal shock and creep Less load bearing capacity Low refractoriness Less resistance to slag attack ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of a basic refractory material is Always less than 1000°C Not affected by the addition of acid oxides Reduced by the addition of acid oxides Increased by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Reduced by the addition of acid oxides Increased by the addition of acid oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C. 1520 1915 1380 1710 1520 1915 1380 1710 ANSWER DOWNLOAD EXAMIANS APP
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