Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Crystalline magnesia Zirconium sulphate Silicon nitride Silicon carbide Crystalline magnesia Zirconium sulphate Silicon nitride Silicon carbide ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of Insulating bricks Muffles for muffle furnaces Segar cones Crucibles used for melting of high purity metals Insulating bricks Muffles for muffle furnaces Segar cones Crucibles used for melting of high purity metals ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cold crushing strength of refractories depends upon its All of these Texture Firing temperature Composition All of these Texture Firing temperature Composition ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the Neither A nor B Both A & B Corrosion by layer of slag Washing action of metal Neither A nor B Both A & B Corrosion by layer of slag Washing action of metal ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Resistance to slag attack of a refractory Depends on the nature of slag & refractory All of these Decreases, if defective joints & cracks exist in the refractory Decreases at higher temperature Depends on the nature of slag & refractory All of these Decreases, if defective joints & cracks exist in the refractory Decreases at higher temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a basic refractory? Chrome magnesite Dolomite Magnesite Silicon carbide Chrome magnesite Dolomite Magnesite Silicon carbide ANSWER DOWNLOAD EXAMIANS APP
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