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Refractory Technology

Refractory Technology
Roof of a basic open hearth furnace is lined with __________ bricks.

Magnesite
Fireclay
Dolomite
Silica

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Refractory Technology
The maximum linear expansion of silica bricks during firing is about __________ percent.

3.5
0.5
1
2

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Refractory Technology
Basic bricks are not made of

Foresterite
Chromite
Magnesite
Fireclay

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Refractory Technology
'Super refractories' are made from pure

Borides
Nitrides
Carbides
Oxides

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Refractory Technology
An ideal refractory should have high

None of these
Fusion point
Spalling rate
Shrinkage ability

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Refractory Technology
Dolomite bricks have good resistance to attack by

Iron oxide
None of these
Molten steel
Lime slag

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