Refractory Technology Which of the following does not occur during firing/burning of refractories? Vitrification Decrease in crushing strength Removal of water of hydration Development of stable mineral form Vitrification Decrease in crushing strength Removal of water of hydration Development of stable mineral form ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With decrease in porosity, the __________ of the refractories decreases. Strength Thermal conductivity None of these Spalling resistance Strength Thermal conductivity None of these Spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High alumina refractories are used in the Dome of blast furnace stoves Electric arc furnace roof All of these Glass melting furnaces Dome of blast furnace stoves Electric arc furnace roof All of these Glass melting furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum safe working temperature for fireclay bricks is about __________ °C. 1550 1150 1450 1300 1550 1150 1450 1300 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of a basic refractory material is Increased by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Reduced by the addition of acid oxides Increased by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Reduced by the addition of acid oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Tar bonded dolomite bricks All of these Are used in outer lining of L.D. converters Have poorer hydration resistance than pitch bonded bricks Are stored under controlled temperature & humidity to avoid hydration All of these Are used in outer lining of L.D. converters Have poorer hydration resistance than pitch bonded bricks Are stored under controlled temperature & humidity to avoid hydration ANSWER DOWNLOAD EXAMIANS APP
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