Refractory Technology Magnesite refractories are used for the construction of those furnaces, which are Not required to resist the corrosive action of basic slag Not subjected to fluctuation in temperature Both (b) and © Used for raising & maintaining high temperature Not required to resist the corrosive action of basic slag Not subjected to fluctuation in temperature Both (b) and © Used for raising & maintaining high temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a high alumina refractory? Bauxite Mullite Dolomite Corrundum Bauxite Mullite Dolomite Corrundum ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica below 870°C ? Quartz Cristobalite None of these Tridymite Quartz Cristobalite None of these Tridymite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With decrease in porosity, the __________ of the refractories decreases. Strength None of these Spalling resistance Thermal conductivity Strength None of these Spalling resistance Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following does not occur during firing/burning of refractories? Decrease in crushing strength Removal of water of hydration Development of stable mineral form Vitrification Decrease in crushing strength Removal of water of hydration Development of stable mineral form Vitrification ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity of silica bricks varies from __________ percent. 45 to 60 5 to 10 60 to 75 20 to 30 45 to 60 5 to 10 60 to 75 20 to 30 ANSWER DOWNLOAD EXAMIANS APP
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