Refractory Technology Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity). Chromite Carborundum Graphite Fireclay Chromite Carborundum Graphite Fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot face insulating linings of high purity alumina fused mullite are used, where Very high temperatures are involved Highly reducing conditions are involved All of these Presence of iron or silica is harmful Very high temperatures are involved Highly reducing conditions are involved All of these Presence of iron or silica is harmful ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not an alumino-silicate refractory? Tar dolomite bricks High alumina bricks Mullite bricks Fireclay bricks Tar dolomite bricks High alumina bricks Mullite bricks Fireclay bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one contains maximum percentage of Al2O₃ ? Aluminous firebrick Magnesite Firebrick Sillimanite Aluminous firebrick Magnesite Firebrick Sillimanite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractories Do not resist temperature fluctuations Do not burn/oxidise, when exposed to air on heating Have extremely low thermal & electrical conductivities Are not attacked by slags, as they are not wetted by melts Do not resist temperature fluctuations Do not burn/oxidise, when exposed to air on heating Have extremely low thermal & electrical conductivities Are not attacked by slags, as they are not wetted by melts ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay bricks is not used for lining the Cupola Roof of open hearth furnace Bottom of hot metal mixer Gas producer Cupola Roof of open hearth furnace Bottom of hot metal mixer Gas producer ANSWER DOWNLOAD EXAMIANS APP
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