Refractory Technology Spray test determines the __________ of refractories. RUL Permanent linear change Resistance to slag penetration Resistance to CO attack RUL Permanent linear change Resistance to slag penetration Resistance to CO attack ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica refractories are not used in Beehive coke ovens 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 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chromite refractories are used in Both A & B Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other Neither A nor B Bottom of soaking pits Both A & B Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other Neither A nor B Bottom of soaking pits ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Using a coarser grog during its manufacture Increasing its porosity Making it denser Decreasing its thermal co-efficient of expansion Using a coarser grog during its manufacture Increasing its porosity Making it denser Decreasing its thermal co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one expands on heating? Neither A nor B Both A & B Silica bricks Fireclay bricks Neither A nor B Both A & B Silica bricks Fireclay bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum water percentage in refractory mix meant for hand moulding may be as high as __________ percent. 7-12 14-20 2-3 5-7 7-12 14-20 2-3 5-7 ANSWER DOWNLOAD EXAMIANS APP
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