Refractory Technology Cold crushing strength of fireclay bricks is about __________ kgf/cm². 500-1000 50-100 200-400 100-150 500-1000 50-100 200-400 100-150 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of a refractory means its Resistancce to compressive loads Fracture due to uneven expansion at high temperature Softening Resistance to chemical action of gases and molten fluxes Resistancce to compressive loads Fracture due to uneven expansion at high temperature Softening Resistance to chemical action of gases and molten fluxes ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following does not occur during firing/burning of refractories? Development of stable mineral form Decrease in crushing strength Vitrification Removal of water of hydration Development of stable mineral form Decrease in crushing strength Vitrification Removal of water of hydration ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractories are not used in Furnaces subjected to fluctuating temperature Making sheaths for thermocouple Lining high temperature ceramic kilns High frequency induction furnaces in the form of inductors Furnaces subjected to fluctuating temperature Making sheaths for thermocouple Lining high temperature ceramic kilns High frequency induction furnaces in the form of inductors ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology What is Thoria? 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 Thoria Has high resistance to basic slags All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Test piece for determination of RUL of a refractory is heated in a/an Electric furnace Oxidising atmosphere Neutral atmosphere Reducing atmosphere Electric furnace Oxidising atmosphere Neutral atmosphere Reducing atmosphere ANSWER DOWNLOAD EXAMIANS APP
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