Refractory Technology Magnesite refractories are generally not used in the Electric furnace walls Burning zone of cement kilns Steel melting furnace Open hearth furnace Electric furnace walls Burning zone of cement kilns Steel melting furnace Open hearth furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Addition of grog in fireclay brick during its manufacture is advantageous, because it results in 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 All of these High strength & thermal spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology SiO₂ percentage in firebrick is about 55-60 >94 35-40 80-85 55-60 >94 35-40 80-85 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite bricks are used in those parts of furnaces, which are None of these Subjected to high load Required to resist corrosive basic slag Subjected to temperature fluctuation None of these Subjected to high load Required to resist corrosive basic slag Subjected to temperature fluctuation ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica below 870°C ? Tridymite Quartz None of these Cristobalite Tridymite Quartz None of these Cristobalite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is a neutral refractory? Graphite Magnesia Silica Magnesite chrome Graphite Magnesia Silica Magnesite chrome ANSWER DOWNLOAD EXAMIANS APP
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