Refractory Technology Which of the following impurities reduces the refractoriness of magnesite bricks? Al2O₃ CaO All of these SiO₂ Al2O₃ CaO All of these SiO₂ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is a basic refractory? None of these Chrome magnesite Fireclay Silica None of these Chrome magnesite Fireclay Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which property of refractories is the most important for top section of the blast furnace? Resistance to corrosion by slag Resistance to abrasion Stability of volume at high temperature Resistance to slag peneration Resistance to corrosion by slag Resistance to abrasion Stability of volume at high temperature Resistance to slag peneration ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology silicon carbide refractories have very low Thermal conductivity None of these Refractoriness (< 1700°C) Resistance to thermal shock Thermal conductivity None of these Refractoriness (< 1700°C) Resistance to thermal shock ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Semi-silica bricks compared to silica bricks have Less fusion point Both A & B Better spalling resistance Neither A nor B Less fusion point Both A & B Better spalling resistance Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Presence of MgO in alumino-silicate refractories __________ its refractoriness. Does not affect Increases Lowers Either A or B; depends on its quantity Does not affect Increases Lowers Either A or B; depends on its quantity ANSWER DOWNLOAD EXAMIANS APP
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