Refractory Technology Which is the stable form of silica upto 1470°C ? Tridymite Cristobalite None of these Quartz Tridymite Cristobalite None of these Quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity is induced in insulating refractories by adding Ammonium chloride/sulphate Calcium phosphate Powdered naphthalene All of these Ammonium chloride/sulphate Calcium phosphate Powdered naphthalene All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent. 90 80 70 55 90 80 70 55 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay bricks is not used for lining the Gas producer Cupola Bottom of hot metal mixer Roof of open hearth furnace Gas producer Cupola Bottom of hot metal mixer Roof of open hearth furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity). Carborundum Fireclay Graphite Chromite Carborundum Fireclay Graphite Chromite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following impurities reduces the refractoriness of magnesite bricks? CaO All of these SiO₂ Al2O₃ CaO All of these SiO₂ Al2O₃ ANSWER DOWNLOAD EXAMIANS APP
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