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Refractory Technology

Refractory Technology
The largest consumer of refractories is the __________ industry.

Metallurgical
Cement
Power
Fertiliser

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Refractory Technology
Silica bricks have low spalling resistance below 600°C, due to its

Very high thermal conductivity
High thermal diffusivity
High co-efficient of expansion upto this temperature
Low refractoriness

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Refractory Technology
Tar dolomite bricks are used in the

Electric furnaces
All of these
Basic Bessemer converter
Basic open hearth furnace

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Refractory Technology
Maximum apparent porosity of magnesite bricks is about __________ percent.

58
24
8
44

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Refractory Technology
Cold crushing strength of a refractory does not depend upon its

Composition
Shape
Firing temperature
Texture

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

Decreases
Increases
Decreases linearly
Remains unchanged

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