Refractory Technology Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the Neither A nor B Corrosion by layer of slag Both A & B Washing action of metal Neither A nor B Corrosion by layer of slag Both A & B Washing action of metal ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Segar cones are used for the determination of __________ of refractories. Softening temperature Electrical conductivity Resistance to slag attack Spalling resistance Softening temperature Electrical conductivity Resistance to slag attack Spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon bricks are not used in the lining of the Blast furnace hearth Highly chemical resistant equipments Electric furnaces Combustion chamber of blast furnace stoves Blast furnace hearth Highly chemical resistant equipments Electric furnaces Combustion chamber of blast furnace stoves ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay bricks is not used for lining the Cupola Bottom of hot metal mixer Gas producer Roof of open hearth furnace Cupola Bottom of hot metal mixer Gas producer Roof of open hearth furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum water percentage in refractory mix meant for hand moulding may be as high as __________ percent. 7-12 5-7 14-20 2-3 7-12 5-7 14-20 2-3 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Addition of grog in fireclay brick during its manufacture is advantageous, because it results in High strength & thermal spalling resistance Less shrinkage in heating, decreased apparent porosity & increased specific gravity All of these Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production High strength & thermal spalling resistance Less shrinkage in heating, decreased apparent porosity & increased specific gravity All of these Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production ANSWER DOWNLOAD EXAMIANS APP
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