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REFRACTORY TECHNOLOGY

Refractory Technology
Hot face insulating linings of high purity alumina fused mullite are used, where

Very high temperatures are involved
Highly reducing conditions are involved
Presence of iron or silica is harmful
All of these

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Refractory Technology
With increase in the alumina content in firebricks, its fusion point (refractoriness)

Increases
Remains unchanged
Decreases
Decreases linearly

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Refractory Technology
Which is required in an insulating refractory?

Low porosity
High thermal conductivity
Neither A nor B
Both A & B

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

Ball
Rod
Tube
Pug

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Refractory Technology
Roof of a basic electric furnace is made of __________ bricks.

Silica
Chromite
None of these
Superduty fireclay

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