Refractory Technology Fireclay bricks are not used in the Combustion chamber of B.F. stoves Beehive coke oven Coke oven regenerators By-product coke oven walls Combustion chamber of B.F. stoves Beehive coke oven Coke oven regenerators By-product coke oven walls ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum apparent porosity of magnesite bricks is about __________ percent. 24 8 44 58 24 8 44 58 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Natural silica Is not stable at high temperature Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes All of these Mainly contains quartz Is not stable at high temperature Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes All of these Mainly contains quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Crushing strength of a refractory Decreases with rise in service temperature Decreases with increase in porosity Is unaffected with change in service temperature Increases with rise in service temperature Decreases with rise in service temperature Decreases with increase in porosity Is unaffected with change in service temperature Increases with rise in service temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica upto 1470°C ? Quartz Tridymite Cristobalite None of these Quartz Tridymite Cristobalite None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Increasing its porosity Decreasing its thermal co-efficient of expansion Using a coarser grog during its manufacture Making it denser Increasing its porosity Decreasing its thermal co-efficient of expansion Using a coarser grog during its manufacture Making it denser ANSWER DOWNLOAD EXAMIANS APP
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