Refractory Technology Bottom of basic open hearth furnace are constructed of Dead burnt magnesite ramming mass Porous fireclay bricks Silicon carbide bricks Semi-silica bricks Dead burnt magnesite ramming mass Porous fireclay bricks Silicon carbide bricks Semi-silica bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Quartz is Stable form of silica upto 870°C Transformed to crystoballite on heating above 1470°C All of these Converted to tridymite on firing between 870 to 1470°C Stable form of silica upto 870°C Transformed to crystoballite on heating above 1470°C All of these Converted to tridymite on firing between 870 to 1470°C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the alumina content in firebricks, its fusion point (refractoriness) Remains unchanged Decreases linearly Decreases Increases Remains unchanged Decreases linearly Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome bricks are used in the Roof lining of basic open hearth & other basic furnaces Reheating furnaces Soaking pits All of these Roof lining of basic open hearth & other basic furnaces Reheating furnaces Soaking pits All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology An indication of degree of firing in silica brick is its Specific gravity Fusion point None of these RUL Specific gravity Fusion point None of these RUL ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum safe working temperature for fireclay bricks is about __________ °C. 1300 1550 1450 1150 1300 1550 1450 1150 ANSWER DOWNLOAD EXAMIANS APP
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