Refractory Technology Which one expands on heating? Neither A nor B Fireclay bricks Silica bricks Both A & B Neither A nor B Fireclay bricks Silica bricks Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum safe working temperature for fireclay bricks is about __________ °C. 1150 1450 1550 1300 1150 1450 1550 1300 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following bricks should not be used, if the furnace is to be used intermit-tantly? Sillimanite Firebricks Silicon carbide bricks Silica bricks Sillimanite Firebricks Silicon carbide bricks Silica bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Resistance to slag attack of a refractory Depends on the nature of slag & refractory Decreases, if defective joints & cracks exist in the refractory All of these Decreases at higher temperature Depends on the nature of slag & refractory Decreases, if defective joints & cracks exist in the refractory All of these Decreases at higher temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spray test determines the __________ of refractories. Permanent linear change RUL Resistance to CO attack Resistance to slag penetration Permanent linear change RUL Resistance to CO attack Resistance to slag penetration ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica refractories are not used in Open hearth furnace roof Dome and upper portion of B.F. stoves Coke oven walls Beehive coke ovens Open hearth furnace roof Dome and upper portion of B.F. stoves Coke oven walls Beehive coke ovens ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS