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Refractory Technology

Refractory Technology
Periclase is

Crystalline form of MgO
Amorphous magnesite
MgCO₃
ZrSO₄

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Refractory Technology
Which one expands on heating?

Both A & B
Fireclay bricks
Silica bricks
Neither A nor B

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

Dolomite
Silica
Magnesite
Fireclay

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Refractory Technology
Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent.

70
80
90
55

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Refractory Technology
Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale.

Chrome or magnesite
Silicon carbide
Silica
Lowduty fireclay

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Refractory Technology
With increase in the alumina content, the refractoriness of high alumina refractories

May increase or decrease
Decreases
Increases
Remains same

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