Refractory Technology Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of Insulating bricks Crucibles used for melting of high purity metals Muffles for muffle furnaces Segar cones Insulating bricks Crucibles used for melting of high purity metals Muffles for muffle furnaces Segar cones ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not a neutral refractory? Magnesite Silicon carbide Chromite Graphite Magnesite Silicon carbide Chromite Graphite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Si percentage in silica refractories used in the walls of coke oven is about 95 60 80 45 95 60 80 45 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Graphite or carbon refractories Are not resistant to corrosion by slag Exhibit high shrinkage on thermal treatment Should be used in neutral or reducing atmosphere Exihibit wetting characteristics Are not resistant to corrosion by slag Exhibit high shrinkage on thermal treatment Should be used in neutral or reducing atmosphere Exihibit wetting characteristics ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chrome magnesite brick is not used for lining the Burning zone of limestone rotary kilns 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 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica bricks have low spalling resistance below 600°C, due to its High thermal diffusivity High co-efficient of expansion upto this temperature Low refractoriness Very high thermal conductivity High thermal diffusivity High co-efficient of expansion upto this temperature Low refractoriness Very high thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
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