Refractory Technology Hollow refractory bricks are made by Hand moulding Slip casting Extrusion Pressing/machine moulding Hand moulding Slip casting Extrusion Pressing/machine moulding ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Natural silica All of these Mainly contains quartz Is not stable at high temperature Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes All of these Mainly contains quartz Is not stable at high temperature Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Increasing its porosity Making it denser Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion Increasing its porosity Making it denser Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica below 870°C ? None of these Tridymite Quartz Cristobalite None of these Tridymite Quartz Cristobalite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot metal runner in blast furnace are lined with __________ bricks. Magnesite Fireclay Carborundum Silica Magnesite Fireclay Carborundum Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for __________ bricks. Dolomite Silica Very low alumina Fireclay Dolomite Silica Very low alumina Fireclay ANSWER DOWNLOAD EXAMIANS APP
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