Refractory Technology Firing temperature of magnesite bricks is about __________ °C. 1000-1200 1600-1800 2400-2600 800-1000 1000-1200 1600-1800 2400-2600 800-1000 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica refractories Can not be used in the dome of hot blast stoves All of these Have lower thermal conductivity than fireclay bricks Crack when subjected to sudden change of temperature Can not be used in the dome of hot blast stoves All of these Have lower thermal conductivity than fireclay bricks Crack when subjected to sudden change of temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology What is Thoria? Thoria Has high resistance to basic slags All of these Thoria Has high fusion temperature (> 3000°C) but poor resistance to thermal shock Which is expensive & radioactive, is used in crucibles for melting high purity metals Thoria Has high resistance to basic slags All of these Thoria Has high fusion temperature (> 3000°C) but poor resistance to thermal shock Which is expensive & radioactive, is used in crucibles for melting high purity metals ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ is not a single oxiderefractory. Magnesia None of these Silicon carbide Zirconia Magnesia None of these Silicon carbide Zirconia ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of Insulating bricks Muffles for muffle furnaces Crucibles used for melting of high purity metals Segar cones Insulating bricks Muffles for muffle furnaces Crucibles used for melting of high purity metals Segar cones ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory Cements Mortars None of these Castables Cements Mortars None of these Castables ANSWER DOWNLOAD EXAMIANS APP
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