Refractory Technology Which of the following impurities reduces the refractoriness of magnesite bricks? Al2O₃ CaO All of these SiO₂ Al2O₃ CaO All of these SiO₂ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum apparent porosity of magnesite bricks is about __________ percent. 24 58 8 44 24 58 8 44 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called Refractoriness under load (RUL) Spalling resistance None of these Refractoriness Refractoriness under load (RUL) Spalling resistance None of these Refractoriness ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica bricks have low spalling resistance below 600°C, due to its Low refractoriness Very high thermal conductivity High thermal diffusivity High co-efficient of expansion upto this temperature Low refractoriness Very high thermal conductivity High thermal diffusivity High co-efficient of expansion upto this temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractories are not used in Furnaces subjected to fluctuating temperature High frequency induction furnaces in the form of inductors Making sheaths for thermocouple Lining high temperature ceramic kilns Furnaces subjected to fluctuating temperature High frequency induction furnaces in the form of inductors Making sheaths for thermocouple Lining high temperature ceramic kilns ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High thermal conductivity of a refractory material is not important, when it is to be used in the Muffle furnace Recuperators Coke oven regenarators Blast furnace Muffle furnace Recuperators Coke oven regenarators Blast furnace ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS