Refractory Technology Hot face insulating linings of high purity alumina fused mullite are used, where Highly reducing conditions are involved Very high temperatures are involved All of these Presence of iron or silica is harmful Highly reducing conditions are involved Very high temperatures are involved All of these Presence of iron or silica is harmful ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum apparent porosity of magnesite bricks is about __________ percent. 58 44 24 8 58 44 24 8 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 Crucibles used for melting of high purity metals Segar cones Insulating bricks Muffles for muffle furnaces Crucibles used for melting of high purity metals Segar cones ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Bauxite calcining rotary kilns are lined with __________ bricks. 85% alumina Carbon Corundum Fireclay 85% alumina Carbon Corundum Fireclay 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 thermal conductivity High crushing strength Non-wetting characteristic None of these High thermal conductivity High crushing strength Non-wetting characteristic None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone. Cooling Burning All of these Preheating Cooling Burning All of these Preheating ANSWER DOWNLOAD EXAMIANS APP
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