Refractory Technology Silica bricks have low spalling resistance below 600°C, due to its High co-efficient of expansion upto this temperature Very high thermal conductivity Low refractoriness High thermal diffusivity High co-efficient of expansion upto this temperature Very high thermal conductivity Low refractoriness High thermal diffusivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity of fireclay refractories is __________ percent. 25-35 44129 43961 35-50 25-35 44129 43961 35-50 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Roof of a basic electric furnace is made of __________ bricks. Superduty fireclay None of these Chromite Silica Superduty fireclay None of these Chromite Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of a basic refractory material is Increased by the addition of acid oxides Reduced by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Increased by the addition of acid oxides Reduced by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides 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 Magnesite Silica Corundum Fireclay Magnesite Silica Corundum ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome bricks are used in the Roof lining of basic open hearth & other basic furnaces Reheating furnaces All of these Soaking pits Roof lining of basic open hearth & other basic furnaces Reheating furnaces All of these Soaking pits ANSWER DOWNLOAD EXAMIANS APP
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