Refractory Technology Which of the following impurities reduces the refractoriness of magnesite bricks? Al2O₃ All of these SiO₂ CaO Al2O₃ All of these SiO₂ CaO ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Natural silica All of these Mainly contains quartz Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Is not stable at high temperature All of these Mainly contains quartz Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Is not stable at high temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chrome magnesite brick is not used for lining the Coke oven regenerator Hearth of soaking pits Bottom hearth of reheating furnace Burning zone of limestone rotary kilns Coke oven regenerator Hearth of soaking pits Bottom hearth of reheating furnace Burning zone of limestone rotary kilns ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology silicon carbide refractories have very low None of these Resistance to thermal shock Thermal conductivity Refractoriness (< 1700°C) None of these Resistance to thermal shock Thermal conductivity Refractoriness (< 1700°C) ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Tar dolomite bricks are used in the Basic open hearth furnace Basic Bessemer converter All of these Electric furnaces Basic open hearth furnace Basic Bessemer converter All of these Electric furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Silicon carbide Silicon nitride Zirconium sulphate Crystalline magnesia Silicon carbide Silicon nitride Zirconium sulphate Crystalline magnesia ANSWER DOWNLOAD EXAMIANS APP
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