Refractory Technology Graphite or carbon refractories Are not resistant to corrosion by slag Should be used in neutral or reducing atmosphere Exhibit high shrinkage on thermal treatment Exihibit wetting characteristics Are not resistant to corrosion by slag Should be used in neutral or reducing atmosphere Exhibit high shrinkage on thermal treatment Exihibit wetting characteristics ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the Neither A nor B Washing action of metal Corrosion by layer of slag Both A & B Neither A nor B Washing action of metal Corrosion by layer of slag Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dolomite bricks have good resistance to attack by Molten steel Iron oxide None of these Lime slag Molten steel Iron oxide None of these Lime slag ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Using a coarser grog during its manufacture Increasing its porosity Decreasing its thermal co-efficient of expansion Making it denser Using a coarser grog during its manufacture Increasing its porosity Decreasing its thermal co-efficient of expansion Making it denser ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity of fireclay refractories is __________ percent. 35-50 44129 25-35 43961 35-50 44129 25-35 43961 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High thermal conductivity of a refractory material is not important, when it is to be used in the Muffle furnace Coke oven regenarators Blast furnace Recuperators Muffle furnace Coke oven regenarators Blast furnace Recuperators ANSWER DOWNLOAD EXAMIANS APP
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