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REFRACTORY TECHNOLOGY

Refractory Technology
Cold crushing strength of fireclay bricks is about __________ kgf/cm².

500-1000
50-100
100-150
200-400

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

24
8
44
58

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Refractory Technology
Spalling tendency of refractories is reduced by increasing its

Porosity
Strength
Thermal conductivity
Specific gravity

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

May increase or decrease
Increases
Decreases
Remains same

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Refractory Technology
Which of the following bricks should not be used, if the furnace is to be used intermit-tantly?

Firebricks
Silicon carbide bricks
Silica bricks
Sillimanite

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