Refractory Technology Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to Fusion under load Thermal spalling Slag attack CO attack Fusion under load Thermal spalling Slag attack CO attack ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one contains maximum percentage of Al2O₃ ? Magnesite Aluminous firebrick Sillimanite Firebrick Magnesite Aluminous firebrick Sillimanite Firebrick 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. 1730 1630 1520 1670 1730 1630 1520 1670 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Test piece for determination of RUL of a refractory is heated in a/an Reducing atmosphere Electric furnace Oxidising atmosphere Neutral atmosphere Reducing atmosphere Electric furnace Oxidising atmosphere Neutral atmosphere ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High alumina refractory compared to fireclay bricks have High resistance to thermal shock and creep Less load bearing capacity Low refractoriness Less resistance to slag attack High resistance to thermal shock and creep Less load bearing capacity Low refractoriness Less resistance to slag attack ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Graphite or carbon refractories Exihibit wetting characteristics Exhibit high shrinkage on thermal treatment Should be used in neutral or reducing atmosphere Are not resistant to corrosion by slag Exihibit wetting characteristics Exhibit high shrinkage on thermal treatment Should be used in neutral or reducing atmosphere Are not resistant to corrosion by slag ANSWER DOWNLOAD EXAMIANS APP
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