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Refractory Technology

Refractory Technology
__________ bricks should not be used in oxidising atmosphere.

Tar dolomite
Silica
Fireclay
Carbon

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

Carborundum
Chromite
Fireclay
Graphite

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Refractory Technology
Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns.

2700
2200
2400
1800

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

Increases
May increase or decrease
Remains same
Decreases

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Refractory Technology
High alumina refractory compared to fireclay bricks have

High resistance to thermal shock and creep
Less load bearing capacity
Less resistance to slag attack
Low refractoriness

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Refractory Technology
Which of the following is not an acidic refractory?

Fireclay bricks
Bauxite bricks
Magnesia bricks
Silica bricks

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