Refractory Technology Panel test determines the __________ of refractories. Fusion point Refractoriness under load (RUL) Spalling resistance Slag penetration resistance Fusion point Refractoriness under load (RUL) Spalling resistance Slag penetration resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories have Low co-efficient of thermal expansion Tendency to expand unduly high during firing Very high cost Poor thermal spalling resistance Low co-efficient of thermal expansion Tendency to expand unduly high during firing Very high cost Poor thermal spalling resistance 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. Refractoriness Crushing strength Spalling resistance Resistance to slag Refractoriness Crushing strength Spalling resistance Resistance to slag ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent. 55 70 80 90 55 70 80 90 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Addition of grog in fireclay brick during its manufacture is advantageous, because it results in Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production Less shrinkage in heating, decreased apparent porosity & increased specific gravity High strength & thermal spalling resistance 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 Less shrinkage in heating, decreased apparent porosity & increased specific gravity High strength & thermal spalling resistance All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hollow refractory bricks are made by Hand moulding Extrusion Pressing/machine moulding Slip casting Hand moulding Extrusion Pressing/machine moulding Slip casting ANSWER DOWNLOAD EXAMIANS APP
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