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Refractory Technology

Refractory Technology
The maximum linear expansion of silica bricks during firing is about __________ percent.

3.5
0.5
1
2

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Refractory Technology
Which is not an alumino-silicate refractory?

Tar dolomite bricks
High alumina bricks
Fireclay bricks
Mullite bricks

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Refractory Technology
Skull is not formed on the carbon blocks in the hearth of a blast furnace, when it becomes cold, becaus of its

None of these
High crushing strength
High thermal conductivity
Non-wetting characteristic

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Refractory Technology
Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.

All of these
Preheating
Burning
Cooling

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Refractory Technology
Zirconia refractory

Does not react with basic slags
Can not be used as an insulator
Is produced from baddeleyite
Has poor electrical conductivity at high temperature

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Refractory Technology
Panel test determines the __________ of refractories.

Slag penetration resistance
Refractoriness under load (RUL)
Spalling resistance
Fusion point

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