Refractory Technology Cermets are combination of ceramic and metallic materials due to which they have high strength & resistance to high temperature. Cermets are used in the Insulation of high temperature furnaces Nuclear reactors, missiles & space crafts Roof of electric furnaces Hearth of the blast furnace Insulation of high temperature furnaces Nuclear reactors, missiles & space crafts Roof of electric furnaces Hearth of the blast furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dolomite bricks have good resistance to attack by Molten steel None of these Iron oxide Lime slag Molten steel None of these Iron oxide Lime slag ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spray test determines the __________ of refractories. Resistance to slag penetration RUL Resistance to CO attack Permanent linear change Resistance to slag penetration RUL Resistance to CO attack Permanent linear change ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Segar cones are used for the determination of __________ of refractories. Softening temperature Resistance to slag attack Spalling resistance Electrical conductivity Softening temperature Resistance to slag attack Spalling resistance Electrical conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Quartz is All of these Stable form of silica upto 870°C Converted to tridymite on firing between 870 to 1470°C Transformed to crystoballite on heating above 1470°C All of these Stable form of silica upto 870°C Converted to tridymite on firing between 870 to 1470°C Transformed to crystoballite on heating above 1470°C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum safe working temperature for fireclay bricks is about __________ °C. 1150 1450 1550 1300 1150 1450 1550 1300 ANSWER DOWNLOAD EXAMIANS APP
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