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Refractory Technology

Refractory Technology
In panel test for spalling resistance, the average face temperature of panel assembly is maintained at __________ °C for 24 hours.

1600
2000
700
1000

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Refractory Technology
Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively.

20 and 80
60 and 40
80 and 20
50 and 50

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Refractory Technology
Which brick undergoes maximum shrinkage on drying?

Fireclay bricks
Chromite bricks
Tar bonded dolomite bricks
Magnesite bricks

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Refractory Technology
Carbon refractory blocks

Are acidic in nature
Are used in the hearth of blast furnace
Are wetted by molten iron
All of these

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Refractory Technology
Which one contains minimum percentage of SiO₂?

Firebrick
Aluminous firebrick
Sillimanite
Semi-silica

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Refractory Technology
RUL of refractories depends on the

Physical structure
Presence of impurities like iron & alkali
All of these
Chemical composition

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