Refractory Technology An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture? Cork Sand Chemically prepared foam Saw dust Cork Sand Chemically prepared foam Saw dust 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 Silica Magnesite Corundum Fireclay Silica Magnesite Corundum ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Zirconium sulphate Silicon carbide Crystalline magnesia Silicon nitride Zirconium sulphate Silicon carbide Crystalline magnesia Silicon nitride ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness under load (RUL) is the most important property for the refractory bricks Used for furnace insulation None of these At the hearth bottom of the furnace on which stock is placed Used in the roof of the furnace Used for furnace insulation None of these At the hearth bottom of the furnace on which stock is placed Used in the roof of the furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ bricks are used in the burning zone of a cement rotary kiln. High alumina Fireclay Silicon carbide Thoria High alumina Fireclay Silicon carbide Thoria ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum apparent porosity of magnesite bricks is about __________ percent. 44 24 8 58 44 24 8 58 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS