Refractory Technology Spalling tendency of refractories is reduced by increasing its Porosity Strength Thermal conductivity Specific gravity Porosity Strength Thermal conductivity Specific gravity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following does not occur during firing/burning of refractories? Removal of water of hydration Development of stable mineral form Decrease in crushing strength Vitrification Removal of water of hydration Development of stable mineral form Decrease in crushing strength Vitrification ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot face insulating linings of high purity alumina fused mullite are used, where Presence of iron or silica is harmful Highly reducing conditions are involved All of these Very high temperatures are involved Presence of iron or silica is harmful Highly reducing conditions are involved All of these Very high temperatures are involved ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of a basic refractory material is Not affected by the addition of acid oxides Always less than 1000°C Increased by the addition of acid oxides Reduced by the addition of acid oxides Not affected by the addition of acid oxides Always less than 1000°C Increased by the addition of acid oxides Reduced by the addition of acid oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories are used for the construction of those furnaces, which are Both (b) and © Not subjected to fluctuation in temperature Not required to resist the corrosive action of basic slag Used for raising & maintaining high temperature Both (b) and © Not subjected to fluctuation in temperature Not required to resist the corrosive action of basic slag Used for raising & maintaining high temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dilatometer is used for the determination of __________ of refractories. Permanent linear change RUL Modulus of rupture Resistance to CO attack Permanent linear change RUL Modulus of rupture Resistance to CO attack ANSWER DOWNLOAD EXAMIANS APP
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