Refractory Technology Which is required in an insulating refractory? Low porosity Both A & B High thermal conductivity Neither A nor B Low porosity Both A & B High thermal conductivity Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology An ideal refractory should have high Fusion point Spalling rate None of these Shrinkage ability Fusion point Spalling rate None of these Shrinkage ability ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum alumina content in high alumina refractory can be as high as __________ percent. 70 90 30 50 70 90 30 50 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories have Tendency to expand unduly high during firing Poor thermal spalling resistance Low co-efficient of thermal expansion Very high cost Tendency to expand unduly high during firing Poor thermal spalling resistance Low co-efficient of thermal expansion Very high cost ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity). Chromite Graphite Fireclay Carborundum Chromite Graphite Fireclay Carborundum ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one contains minimum percentage of SiO₂? Firebrick Sillimanite Aluminous firebrick Semi-silica Firebrick Sillimanite Aluminous firebrick Semi-silica ANSWER DOWNLOAD EXAMIANS APP
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