Refractory Technology Which of the following does not occur during firing/burning of refractories? Removal of water of hydration Development of stable mineral form Vitrification Decrease in crushing strength Removal of water of hydration Development of stable mineral form Vitrification Decrease in crushing strength ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Rate of slag attack on refractories increases with rise in temperature due to the None of these Decreased viscosity of slag Oxidising condition in the furnace Increased thermal conductivity of brick None of these Decreased viscosity of slag Oxidising condition in the furnace Increased thermal conductivity of brick ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following bricks has the most close values of RUL and PCE? Tar dolomite bricks High alumina bricks Silica bricks Fireclay bricks Tar dolomite bricks High alumina bricks Silica bricks Fireclay bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold. High density Low porosity High thermal conductivity Non-wetting characteristics High density Low porosity High thermal conductivity Non-wetting characteristics ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively. 50 and 50 60 and 40 80 and 20 20 and 80 50 and 50 60 and 40 80 and 20 20 and 80 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite bricks have poor resistance to attack by __________ slag. Acid None of these Basic Lime Acid None of these Basic Lime ANSWER DOWNLOAD EXAMIANS APP
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