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Refractory Technology

Refractory Technology
Thermal diffusivity of a refractory brick is high, when its __________ is high.

Density
Thermal conductivity
None of these
Specific heat

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Refractory Technology
Maximum alumina content in high alumina refractory can be as high as __________ percent.

90
30
70
50

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Refractory Technology
Fireclay bricks are used in the

Chimney linings
Furnaces allowed to cool frequently
All of these
Flues

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Refractory Technology
Alumina-graphite bricks are used for lining the

Neither A nor B
Slide gate in teeming laddies
Both A & B
Continuous casting systems

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Refractory Technology
Magnesite refractories are used for the construction of those furnaces, which are

Both (b) and ©
Not subjected to fluctuation in temperature
Not required to resist the corrosive action of basic slag
Used for raising & maintaining high temperature

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Refractory Technology
Magnesite bricks have poor resistance to attack by __________ slag.

Lime
None of these
Acid
Basic

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