Refractory Technology Which one contains minimum percentage of SiO₂? Aluminous firebrick Firebrick Semi-silica Sillimanite Aluminous firebrick Firebrick Semi-silica Sillimanite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hollow refractory bricks are made by Pressing/machine moulding Hand moulding Extrusion Slip casting Pressing/machine moulding Hand moulding Extrusion Slip casting ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C. 70 770 270 570 70 770 270 570 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Rate of slag attack on refractories increases with rise in temperature due to the Oxidising condition in the furnace Increased thermal conductivity of brick None of these Decreased viscosity of slag Oxidising condition in the furnace Increased thermal conductivity of brick None of these Decreased viscosity of slag ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zircon refractories have Low co-efficient of expansion High spalling resistance All of these High RUL (1600°C) and refractoriness (> 2000°C) Low co-efficient of expansion High spalling resistance All of these High RUL (1600°C) and refractoriness (> 2000°C) ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon bricks are not used in the lining of the Blast furnace hearth Combustion chamber of blast furnace stoves Highly chemical resistant equipments Electric furnaces Blast furnace hearth Combustion chamber of blast furnace stoves Highly chemical resistant equipments Electric furnaces ANSWER DOWNLOAD EXAMIANS APP
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