Refractory Technology Maximum safe working temperature for fireclay bricks is about __________ °C. 1550 1150 1300 1450 1550 1150 1300 1450 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Increasing its porosity Using a coarser grog during its manufacture Making it denser Decreasing its thermal co-efficient of expansion Increasing its porosity Using a coarser grog during its manufacture Making it denser Decreasing its thermal co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Insulating refractories should have Low thermal conductivity High porosity Neither A nor B Both A & B Low thermal conductivity High porosity Neither A nor B Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot face insulating linings of high purity alumina fused mullite are used, where All of these Very high temperatures are involved Presence of iron or silica is harmful Highly reducing conditions are involved All of these Very high temperatures are involved Presence of iron or silica is harmful Highly reducing conditions are involved ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity is induced in insulating refractories by adding Calcium phosphate All of these Powdered naphthalene Ammonium chloride/sulphate Calcium phosphate All of these Powdered naphthalene Ammonium chloride/sulphate ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent. 90 55 70 80 90 55 70 80 ANSWER DOWNLOAD EXAMIANS APP
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