Refractory Technology Silica refractories are not used in Open hearth furnace roof Beehive coke ovens Coke oven walls Dome and upper portion of B.F. stoves Open hearth furnace roof Beehive coke ovens Coke oven walls Dome and upper portion of B.F. stoves ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following bricks should not be used, if the furnace is to be used intermit-tantly? Sillimanite Firebricks Silicon carbide bricks Silica bricks Sillimanite Firebricks Silicon carbide bricks Silica bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Addition of grog in fireclay brick during its manufacture is advantageous, because it results in All of these 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 Less shrinkage in heating, decreased apparent porosity & increased specific gravity All of these 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 Less shrinkage in heating, decreased apparent porosity & increased specific gravity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Semi-silica bricks compared to silica bricks have Better spalling resistance Both A & B Less fusion point Neither A nor B Better spalling resistance Both A & B Less fusion point Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a basic refractory? Magnesite Chrome magnesite Silicon carbide Dolomite Magnesite Chrome magnesite Silicon carbide Dolomite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory bricks having lower porosity have High insulating properties Greater strength Low thermal conductivity Low heat capacity High insulating properties Greater strength Low thermal conductivity Low heat capacity ANSWER DOWNLOAD EXAMIANS APP
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