Refractory Technology Addition of grog in fireclay brick during its manufacture is advantageous, because it results in All of these Less shrinkage in heating, decreased apparent porosity & increased specific gravity High strength & thermal spalling resistance Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production All of these Less shrinkage in heating, decreased apparent porosity & increased specific gravity High strength & thermal spalling resistance Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity is induced in insulating refractories by adding Powdered naphthalene Ammonium chloride/sulphate All of these Calcium phosphate Powdered naphthalene Ammonium chloride/sulphate All of these Calcium phosphate ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Slide gates in teeming laddie used for steel pouring in ingot moulds is lined with __________ bricks. Semi-silica Fireclay Silica Bakelite impregnated or fused periclase Semi-silica Fireclay Silica Bakelite impregnated or fused periclase ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories are used for the construction of those furnaces, which are Not required to resist the corrosive action of basic slag Both (b) and © Used for raising & maintaining high temperature Not subjected to fluctuation in temperature Not required to resist the corrosive action of basic slag Both (b) and © Used for raising & maintaining high temperature Not subjected to fluctuation in temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories have low resistance to Attack by basic slag Abrasion Disintegration on sudden change of temperature Both B and C Attack by basic slag Abrasion Disintegration on sudden change of temperature Both B and C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity of silica bricks varies from __________ percent. 60 to 75 45 to 60 20 to 30 5 to 10 60 to 75 45 to 60 20 to 30 5 to 10 ANSWER DOWNLOAD EXAMIANS APP
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