Refractory Technology Cermets are Used in space vehicles, missiles & nuclear energy plants All of these Composite material containing both ceramic & metallic constituents Having high strength & resistance to high temperature Used in space vehicles, missiles & nuclear energy plants All of these Composite material containing both ceramic & metallic constituents Having high strength & resistance to high temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractories are not used in Making sheaths for thermocouple High frequency induction furnaces in the form of inductors Lining high temperature ceramic kilns Furnaces subjected to fluctuating temperature Making sheaths for thermocouple High frequency induction furnaces in the form of inductors Lining high temperature ceramic kilns Furnaces subjected to fluctuating temperature 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 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 All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to Slag attack Thermal spalling CO attack Fusion under load Slag attack Thermal spalling CO attack Fusion under load 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 Very high temperatures are involved Highly reducing conditions are involved All of these Presence of iron or silica is harmful Very high temperatures are involved Highly reducing conditions are involved All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Skull is not formed on the carbon blocks in the hearth of a blast furnace, when it becomes cold, becaus of its High crushing strength None of these High thermal conductivity Non-wetting characteristic High crushing strength None of these High thermal conductivity Non-wetting characteristic ANSWER DOWNLOAD EXAMIANS APP
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