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Refractory Technology

Refractory Technology
__________ is the measure of the strength of refractory under the combined effect of temperature & load.

Thermal conductivity
Specific gravity
RUL
Porosity

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Refractory Technology
Refractory materials are never used in the construction of

Orton cones
Ovens & retorts
Segar cones
Pressure vessels

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Refractory Technology
Porosity of silica bricks varies from __________ percent.

45 to 60
20 to 30
60 to 75
5 to 10

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Refractory Technology
Hot face insulating linings of high purity alumina fused mullite are used, where

Presence of iron or silica is harmful
Very high temperatures are involved
Highly reducing conditions are involved
All of these

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Refractory Technology
Si percentage in silica refractories used in the walls of coke oven is about

80
45
60
95

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Refractory Technology
Alumina-graphite bricks are used for lining the

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

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