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Refractory Technology

Refractory Technology
Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity).

Carborundum
Fireclay
Graphite
Chromite

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Refractory Technology
Silliminite (Al2O₃.SiO₂) refractory, which is a neutral refractory, is not used in

Gas retorts
Pottery furnace
Crucibles
Glass melting furnace

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Refractory Technology
Mixing of ground refractory material and water is done in a __________ mill.

Pug
Ball
Rod
Tube

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Refractory Technology
Porosity of fireclay refractories is __________ percent.

25-35
43961
35-50
44129

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Refractory Technology
Panel test determines the __________ of refractories.

Fusion point
Slag penetration resistance
Refractoriness under load (RUL)
Spalling resistance

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Refractory Technology
Colour of fireclay bricks is

None of these
Yellow
Black
Light buff to reddish buff

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