Refractory Technology Spalling tendency of refractories is reduced by increasing its Specific gravity Thermal conductivity Porosity Strength Specific gravity Thermal conductivity Porosity Strength ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increasing alumina content, the fusion point of high alumina refractories Remains constant Decreases Increases May increase or decrease ; depends on its alumina content Remains constant Decreases Increases May increase or decrease ; depends on its alumina content ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology To resist spalling tendency, a refractory should have Low specific heat All of these Greater diffusivity Low thermal co-efficient of expansion Low specific heat All of these Greater diffusivity Low thermal co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not a high alumina refractory material? Sillimanite Diaspore Periclase Kyanite Sillimanite Diaspore Periclase Kyanite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal conductivity of refractory bricks Increases with decrease in porosity Decreases with decreases in porosity Increases with the amount of air entrapped in pores Is independent of its porosity and is maximum for insulating bricks Increases with decrease in porosity Decreases with decreases in porosity Increases with the amount of air entrapped in pores Is independent of its porosity and is maximum for insulating bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material? Plaster of paris Lime Aluminium phosphate Water Plaster of paris Lime Aluminium phosphate Water ANSWER DOWNLOAD EXAMIANS APP
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