Refractory Technology Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material? Lime Water Aluminium phosphate Plaster of paris Lime Water Aluminium phosphate Plaster of paris ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories used in/for __________ should have low thermal conductivity. Insulation Coke ovens Regenerators Muffle furnaces Insulation Coke ovens Regenerators Muffle furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Ferromagnetic ceramic material is not used in the Thermal insulation Television sets Magnetic switches Transformers Thermal insulation Television sets Magnetic switches Transformers ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Si percentage in silica refractories used in the walls of coke oven is about 95 60 45 80 95 60 45 80 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Making it denser Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion Increasing its porosity Making it denser Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion Increasing its porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology What is Thoria? Which is expensive & radioactive, is used in crucibles for melting high purity metals Thoria Has high fusion temperature (> 3000°C) but poor resistance to thermal shock Thoria Has high resistance to basic slags All of these Which is expensive & radioactive, is used in crucibles for melting high purity metals Thoria Has high fusion temperature (> 3000°C) but poor resistance to thermal shock Thoria Has high resistance to basic slags All of these ANSWER DOWNLOAD EXAMIANS APP
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