Refractory Technology Furnace atmosphere for softening temperature determination of refractories (in which segar cones are placed) should be Neither A nor B Neutral Oxidising Either A or B Neither A nor B Neutral Oxidising Either A or B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Addition of grog in fireclay brick during its manufacture is advantageous, because it results in High strength & thermal spalling resistance All of these Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production Less shrinkage in heating, decreased apparent porosity & increased specific gravity High strength & thermal spalling resistance All of these Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production Less shrinkage in heating, decreased apparent porosity & increased specific gravity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Mixing of ground refractory material and water is done in a __________ mill. Pug Rod Tube Ball Pug Rod Tube Ball ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following bricks should not be used, if the furnace is to be used intermit-tantly? Silica bricks Silicon carbide bricks Sillimanite Firebricks Silica bricks Silicon carbide bricks Sillimanite Firebricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Highest melting (m.p = 3070°C) oxide refractory is Zirconia Magnesia Thoria Alumina Zirconia Magnesia Thoria Alumina ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Resistance to slag attack of a refractory All of these Depends on the nature of slag & refractory Decreases at higher temperature Decreases, if defective joints & cracks exist in the refractory All of these Depends on the nature of slag & refractory Decreases at higher temperature Decreases, if defective joints & cracks exist in the refractory ANSWER DOWNLOAD EXAMIANS APP
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