Refractory Technology Spalling resistance of a refractory can not be increased by Increasing its porosity Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion Making it denser Increasing its porosity Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion Making it denser ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology 10 to 30% magnesite is added to chromite to produce chrome-magnesite refractories. Magnesite addition is mainly done to improve the __________ of chromite. Resistance to slag Spalling resistance Crushing strength Refractoriness Resistance to slag Spalling resistance Crushing strength Refractoriness ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not an acidic refractory? Fireclay bricks Magnesia bricks Silica bricks Bauxite bricks Fireclay bricks Magnesia bricks Silica bricks Bauxite bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Tar bonded dolomite bricks Are stored under controlled temperature & humidity to avoid hydration Are used in outer lining of L.D. converters All of these Have poorer hydration resistance than pitch bonded bricks Are stored under controlled temperature & humidity to avoid hydration Are used in outer lining of L.D. converters All of these Have poorer hydration resistance than pitch bonded bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone. Preheating All of these Cooling Burning Preheating All of these Cooling Burning ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion temperature of pure silica (SiO₂) is __________ °C. 2800 1350 1715 2570 2800 1350 1715 2570 ANSWER DOWNLOAD EXAMIANS APP
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