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Refractory Technology

Refractory Technology
Which is a neutral refractory?

Graphite
Magnesite chrome
Magnesia
Silica

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Refractory Technology
Pure oxide refractories are generally monocrystaliine in nature and are self bonded __________ bricks are generally used as moderator in nuclear reactors.

Beryllia
Carborundum
Corundum
Thoria

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Refractory Technology
Which of the following bricks has the most close values of RUL and PCE?

Silica bricks
Tar dolomite bricks
Fireclay bricks
High alumina bricks

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Refractory Technology
Test piece for determination of RUL of a refractory is heated in a/an

Reducing atmosphere
Neutral atmosphere
Oxidising atmosphere
Electric furnace

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Refractory Technology
High alumina refractories are used in the

Glass melting furnaces
Dome of blast furnace stoves
Electric arc furnace roof
All of these

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

Crucibles
Pottery furnace
Glass melting furnace
Gas retorts

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