Refractory Technology Which one contains minimum percentage of SiO₂? Firebrick Semi-silica Sillimanite Aluminous firebrick Firebrick Semi-silica Sillimanite Aluminous firebrick ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a high alumina refractory? Mullite Corrundum Bauxite Dolomite Mullite Corrundum Bauxite Dolomite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except Electrical conductivity Fusion point Thermal conductivity Cost Electrical conductivity Fusion point Thermal conductivity Cost ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pyrometric cone equivalent (PCE) value (Segar cone) of 'superduty refractories' is more than 33 which corresponds to a temperature of __________ °C. 1630 1520 1730 1670 1630 1520 1730 1670 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Presence of MgO in alumino-silicate refractories __________ its refractoriness. Lowers Does not affect Either A or B; depends on its quantity Increases Lowers Does not affect Either A or B; depends on its quantity Increases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to Fusion under load Slag attack CO attack Thermal spalling Fusion under load Slag attack CO attack Thermal spalling ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS