Refractory Technology Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C. 570 770 270 70 570 770 270 70 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one contains maximum percentage of Al2O₃ ? Magnesite Sillimanite Firebrick Aluminous firebrick Magnesite Sillimanite Firebrick Aluminous firebrick ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Insulating refractories should have High porosity Neither A nor B Both A & B Low thermal conductivity High porosity Neither A nor B Both A & B Low thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spray test determines the __________ of refractories. RUL Resistance to slag penetration Permanent linear change Resistance to CO attack RUL Resistance to slag penetration Permanent linear change Resistance to CO attack 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 90 80 55 70 90 80 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Grog Iscrushed firebrick Contains both alumina and silica All of these Is a non-plastic material Iscrushed firebrick Contains both alumina and silica All of these Is a non-plastic material ANSWER DOWNLOAD EXAMIANS APP
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