Refractory Technology Which is not a natural insulating material? Asbestos None of these Vermiculite Diatomaceous earth/kieselgur Asbestos None of these Vermiculite Diatomaceous earth/kieselgur ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractory blocks Are used in the hearth of blast furnace Are wetted by molten iron Are acidic in nature All of these Are used in the hearth of blast furnace Are wetted by molten iron Are acidic in nature All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica refractories Have lower thermal conductivity than fireclay bricks Crack when subjected to sudden change of temperature Can not be used in the dome of hot blast stoves All of these Have lower thermal conductivity than fireclay bricks Crack when subjected to sudden change of temperature Can not be used in the dome of hot blast stoves All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Periclase refractory contains mainly SiO₂ Al2O₃ CaO MgO SiO₂ Al2O₃ CaO MgO ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology The maximum linear expansion of silica bricks during firing is about __________ percent. 3.5 0.5 1 2 3.5 0.5 1 2 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling tendency of refractories is reduced by increasing its Porosity Strength Thermal conductivity Specific gravity Porosity Strength Thermal conductivity Specific gravity ANSWER DOWNLOAD EXAMIANS APP
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