Refractory Technology Thermal conductivity of refractory bricks Increases with decrease in porosity Decreases with decreases in porosity Increases with the amount of air entrapped in pores Is independent of its porosity and is maximum for insulating bricks Increases with decrease in porosity Decreases with decreases in porosity Increases with the amount of air entrapped in pores Is independent of its porosity and is maximum for insulating bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica below 870°C ? Quartz None of these Cristobalite Tridymite Quartz None of these Cristobalite Tridymite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following does not occur during firing/burning of refractories? Vitrification Removal of water of hydration Development of stable mineral form Decrease in crushing strength Vitrification Removal of water of hydration Development of stable mineral form Decrease in crushing strength ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is required in an insulating refractory? Both A & B Neither A nor B Low porosity High thermal conductivity Both A & B Neither A nor B Low porosity High thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dolomite bricks have good resistance to attack by Iron oxide None of these Lime slag Molten steel Iron oxide None of these Lime slag Molten steel ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is a basic refractory? Silica None of these Fireclay Chrome magnesite Silica None of these Fireclay Chrome magnesite ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS