Refractory Technology Insulating refractories should have Both A & B Low thermal conductivity High porosity Neither A nor B Both A & B Low thermal conductivity High porosity Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Highest melting (m.p = 3070°C) oxide refractory is Magnesia Alumina Thoria Zirconia Magnesia Alumina Thoria Zirconia 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 All of these Highly reducing conditions are involved Very high temperatures are involved Presence of iron or silica is harmful All of these Highly reducing conditions are involved Very high temperatures are involved ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not a high alumina refractory material? Kyanite Diaspore Sillimanite Periclase Kyanite Diaspore Sillimanite Periclase ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology RUL of refractories depends on the Chemical composition Presence of impurities like iron & alkali All of these Physical structure Chemical composition Presence of impurities like iron & alkali All of these Physical structure ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Addition of grog in fireclay brick during its manufacture is advantageous, because it results in All of these 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 High strength & thermal spalling resistance All of these 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 High strength & thermal spalling resistance ANSWER DOWNLOAD EXAMIANS APP
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