Refractory Technology Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of Muffles for muffle furnaces Crucibles used for melting of high purity metals Segar cones Insulating bricks Muffles for muffle furnaces Crucibles used for melting of high purity metals Segar cones Insulating bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Slide gates in teeming laddie used for steel pouring in ingot moulds is lined with __________ bricks. Bakelite impregnated or fused periclase Silica Semi-silica Fireclay Bakelite impregnated or fused periclase Silica Semi-silica Fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Insulating refractories should have High porosity Neither A nor B Both A & B Low thermal conductivity High porosity Neither A nor B Both A & B Low thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not an acidic refractory? Bauxite bricks Fireclay bricks Magnesia bricks Silica bricks Bauxite bricks Fireclay bricks Magnesia bricks Silica bricks ANSWER DOWNLOAD EXAMIANS APP
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 Which of the following has the lowest electrical resistivity? Zircon Graphite Alumina Fireclay Zircon Graphite Alumina Fireclay ANSWER DOWNLOAD EXAMIANS APP
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