Refractory Technology Zircon refractories have All of these High spalling resistance High RUL (1600°C) and refractoriness (> 2000°C) Low co-efficient of expansion All of these High spalling resistance High RUL (1600°C) and refractoriness (> 2000°C) Low co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay bricks are used in the Flues Chimney linings All of these Furnaces allowed to cool frequently Flues Chimney linings All of these Furnaces allowed to cool frequently ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C. 1915 1710 1380 1520 1915 1710 1380 1520 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one expands on heating? Fireclay bricks Silica bricks Neither A nor B Both A & B Fireclay bricks Silica bricks Neither A nor B Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture? Sand Chemically prepared foam Cork Saw dust Sand Chemically prepared foam Cork Saw dust ANSWER DOWNLOAD EXAMIANS APP
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 Roof of electric furnaces Nuclear reactors, missiles & space crafts Insulation of high temperature furnaces Hearth of the blast furnace Roof of electric furnaces Nuclear reactors, missiles & space crafts Insulation of high temperature furnaces Hearth of the blast furnace ANSWER DOWNLOAD EXAMIANS APP
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