Refractory Technology What is Thoria? All of these Thoria Has high resistance to basic slags Which is expensive & radioactive, is used in crucibles for melting high purity metals Thoria Has high fusion temperature (> 3000°C) but poor resistance to thermal shock All of these Thoria Has high resistance to basic slags Which is expensive & radioactive, is used in crucibles for melting high purity metals Thoria Has high fusion temperature (> 3000°C) but poor resistance to thermal shock ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology 10 to 30% magnesite is added to chromite to produce chrome-magnesite refractories. Magnesite addition is mainly done to improve the __________ of chromite. Spalling resistance Resistance to slag Crushing strength Refractoriness Spalling resistance Resistance to slag Crushing strength Refractoriness ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Segar cones are used for the determination of __________ of refractories. Electrical conductivity Softening temperature Resistance to slag attack Spalling resistance Electrical conductivity Softening temperature Resistance to slag attack Spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the density of silica refractories, its Neither A nor B Both A & B Spalling resistance reduces Resistance to slag attack increases Neither A nor B Both A & B Spalling resistance reduces Resistance to slag attack increases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Lower part of hot metal mixer are lined with __________ bricks. Superduty fireclay High alumina Carborundum Silica Superduty fireclay High alumina Carborundum Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology 'Super refractories' are made from pure Oxides Nitrides Borides Carbides Oxides Nitrides Borides Carbides ANSWER DOWNLOAD EXAMIANS APP
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