Refractory Technology Silica refractories are not used in Beehive coke ovens Coke oven walls Open hearth furnace roof Dome and upper portion of B.F. stoves Beehive coke ovens Coke oven walls Open hearth furnace roof Dome and upper portion of B.F. stoves ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology What is Thoria? All of these Thoria Has high fusion temperature (> 3000°C) but poor resistance to thermal shock Thoria Has high resistance to basic slags Which is expensive & radioactive, is used in crucibles for melting high purity metals All of these Thoria Has high fusion temperature (> 3000°C) but poor resistance to thermal shock Thoria Has high resistance to basic slags Which is expensive & radioactive, is used in crucibles for melting high purity metals ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology The linear thermal expansion of __________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent. Fireclay Magnesite Silica Corundum Fireclay Magnesite Silica Corundum ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Furnace atmosphere for softening temperature determination of refractories (in which segar cones are placed) should be Oxidising Neutral Neither A nor B Either A or B Oxidising Neutral Neither A nor B Either A or B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology The highest melting pure oxide (m.p. > 3000°C) is Zirconia Thoria Beryllia Alumina Zirconia Thoria Beryllia Alumina ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the most stable crystalline form of silica at room temperature? Tridymite Cristobalite None of these Quartz Tridymite Cristobalite None of these Quartz ANSWER DOWNLOAD EXAMIANS APP
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