Refractory Technology Which one contains minimum percentage of SiO₂? Firebrick Aluminous firebrick Semi-silica Sillimanite Firebrick Aluminous firebrick Semi-silica Sillimanite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale. Chrome or magnesite Lowduty fireclay Silicon carbide Silica Chrome or magnesite Lowduty fireclay Silicon carbide Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Resistance to slag attack of a refractory Decreases at higher temperature Decreases, if defective joints & cracks exist in the refractory All of these Depends on the nature of slag & refractory Decreases at higher temperature Decreases, if defective joints & cracks exist in the refractory All of these Depends on the nature of slag & refractory 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 is required in an insulating refractory? Both A & B Low porosity High thermal conductivity Neither A nor B Both A & B Low porosity High thermal conductivity Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Periclase refractory contains mainly MgO CaO Al2O₃ SiO₂ MgO CaO Al2O₃ SiO₂ ANSWER DOWNLOAD EXAMIANS APP
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