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 Refractoriness Crushing strength Spalling resistance Resistance to slag Refractoriness Crushing strength ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zircon refractories have High spalling resistance All of these High RUL (1600°C) and refractoriness (> 2000°C) Low co-efficient of expansion High spalling resistance All of these High RUL (1600°C) and refractoriness (> 2000°C) Low co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay bricks are used in the Flues Chimney linings Furnaces allowed to cool frequently All of these Flues Chimney linings Furnaces allowed to cool frequently All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory None of these Cements Mortars Castables None of these Cements Mortars Castables ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Semi-silica bricks compared to silica bricks have Less fusion point Neither A nor B Better spalling resistance Both A & B Less fusion point Neither A nor B Better spalling resistance Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity). Chromite Carborundum Fireclay Graphite Chromite Carborundum Fireclay Graphite ANSWER DOWNLOAD EXAMIANS APP
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