Refractory Technology The linear thermal expansion of __________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent. Corundum Silica Fireclay Magnesite Corundum Silica Fireclay Magnesite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Sillimanite is a __________ refractory. Basic Insulating Neutral High alumina Basic Insulating Neutral High alumina ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories have low resistance to Both B and C Abrasion Disintegration on sudden change of temperature Attack by basic slag Both B and C Abrasion Disintegration on sudden change of temperature Attack by basic slag ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories have Poor thermal spalling resistance Low co-efficient of thermal expansion Tendency to expand unduly high during firing Very high cost Poor thermal spalling resistance Low co-efficient of thermal expansion Tendency to expand unduly high during firing Very high cost ANSWER DOWNLOAD EXAMIANS APP
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 Spalling tendency of refractories is reduced by increasing its Specific gravity Strength Thermal conductivity Porosity Specific gravity Strength Thermal conductivity Porosity ANSWER DOWNLOAD EXAMIANS APP
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