Refractory Technology Magnesite bricks have poor resistance to attack by __________ slag. None of these Acid Basic Lime None of these Acid Basic Lime ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity of silica bricks varies from __________ percent. 5 to 10 60 to 75 45 to 60 20 to 30 5 to 10 60 to 75 45 to 60 20 to 30 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 Cold crushing strength of a refractory does not depend upon its Firing temperature Texture Composition Shape Firing temperature Texture Composition Shape ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology silicon carbide refractories have very low Thermal conductivity Refractoriness (< 1700°C) None of these Resistance to thermal shock Thermal conductivity Refractoriness (< 1700°C) None of these Resistance to thermal shock ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of a basic refractory material is Not affected by the addition of acid oxides Increased by the addition of acid oxides Always less than 1000°C Reduced by the addition of acid oxides Not affected by the addition of acid oxides Increased by the addition of acid oxides Always less than 1000°C Reduced by the addition of acid oxides ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS