Refractory Technology Carbon refractories Do not resist temperature fluctuations Have extremely low thermal & electrical conductivities Are not attacked by slags, as they are not wetted by melts Do not burn/oxidise, when exposed to air on heating Do not resist temperature fluctuations Have extremely low thermal & electrical conductivities Are not attacked by slags, as they are not wetted by melts Do not burn/oxidise, when exposed to air on heating ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold. High density High thermal conductivity Non-wetting characteristics Low porosity High density High thermal conductivity Non-wetting characteristics Low porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which brick undergoes maximum shrinkage on drying? Tar bonded dolomite bricks Fireclay bricks Magnesite bricks Chromite bricks Tar bonded dolomite bricks Fireclay bricks Magnesite bricks Chromite bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Permeability of bricks is a measure of the Melting point Expansion during heating Rate at which a fluid will pass through the pores Refractoriness Melting point Expansion during heating Rate at which a fluid will pass through the pores Refractoriness ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increasing alumina content, the fusion point of high alumina refractories May increase or decrease ; depends on its alumina content Remains constant Decreases Increases May increase or decrease ; depends on its alumina content Remains constant Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone. Preheating Cooling All of these Burning Preheating Cooling All of these Burning ANSWER DOWNLOAD EXAMIANS APP
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