Refractory Technology Spalling tendency of refractories is reduced by increasing its Strength Specific gravity Thermal conductivity Porosity Strength Specific gravity Thermal conductivity Porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal spalling mainly occurs during __________ of furnaces. Both A & B Warming up Cooling down Neither A nor B Both A & B Warming up Cooling down Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is an acidic refractory? Dolomite Fireclay Magnesite Chrome magnesite Dolomite Fireclay Magnesite Chrome magnesite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Roof of a basic electric furnace is made of __________ bricks. Superduty fireclay Chromite None of these Silica Superduty fireclay Chromite None of these Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Furnace atmosphere for softening temperature determination of refractories (in which segar cones are placed) should be Oxidising Either A or B Neither A nor B Neutral Oxidising Either A or B Neither A nor B Neutral ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal conductivity of refractory bricks Decreases with decreases in porosity Increases with decrease in porosity Is independent of its porosity and is maximum for insulating bricks Increases with the amount of air entrapped in pores Decreases with decreases in porosity Increases with decrease in porosity Is independent of its porosity and is maximum for insulating bricks Increases with the amount of air entrapped in pores ANSWER DOWNLOAD EXAMIANS APP
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