Refractory Technology Which one contains maximum percentage of Al2O₃ ? Aluminous firebrick Firebrick Magnesite Sillimanite Aluminous firebrick Firebrick Magnesite Sillimanite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Presence of MgO in alumino-silicate refractories __________ its refractoriness. Increases Does not affect Lowers Either A or B; depends on its quantity Increases Does not affect Lowers Either A or B; depends on its quantity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica bricks have low spalling resistance below 600°C, due to its Low refractoriness High thermal diffusivity Very high thermal conductivity High co-efficient of expansion upto this temperature Low refractoriness High thermal diffusivity Very high thermal conductivity High co-efficient of expansion upto this temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Mixing of ground refractory material and water is done in a __________ mill. Pug Ball Rod Tube Pug Ball Rod Tube ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica between 1470°C and the melting point 1713°C ? Cristobalite Quartz None of these Tridymite Cristobalite Quartz None of these Tridymite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With decrease in porosity, the __________ of the refractories decreases. Thermal conductivity Strength None of these Spalling resistance Thermal conductivity Strength None of these Spalling resistance ANSWER DOWNLOAD EXAMIANS APP
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