Refractory Technology Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to CO attack Fusion under load Slag attack Thermal spalling CO attack Fusion under load Slag attack Thermal spalling ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal spalling mainly occurs during __________ of furnaces. Cooling down Warming up Neither A nor B Both A & B Cooling down Warming up Neither A nor B Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ bricks are used in the burning zone of a cement rotary kiln. Silicon carbide High alumina Thoria Fireclay Silicon carbide High alumina Thoria Fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica bricks are never used for lining the By-product coke ovens Dome of blast furnace stoves Roof of open hearth furnace Beehive coke ovens By-product coke ovens Dome of blast furnace stoves Roof of open hearth furnace Beehive coke ovens ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one expands on heating? Both A & B Fireclay bricks Neither A nor B Silica bricks Both A & B Fireclay bricks Neither A nor B Silica bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal conductivity of refractory bricks Increases with the amount of air entrapped in pores Decreases with decreases in porosity Is independent of its porosity and is maximum for insulating bricks Increases with decrease in porosity Increases with the amount of air entrapped in pores Decreases with decreases in porosity Is independent of its porosity and is maximum for insulating bricks Increases with decrease in porosity ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS