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Refractory Technology

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

Porosity
Thermal conductivity
Specific gravity
RUL

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Refractory Technology
High alumina refractories are used in the

Dome of blast furnace stoves
All of these
Electric arc furnace roof
Glass melting furnaces

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Refractory Technology
Semi-silica bricks compared to silica bricks have

Both A & B
Neither A nor B
Better spalling resistance
Less fusion point

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Refractory Technology
Bauxite calcining rotary kilns are lined with __________ bricks.

Fireclay
85% alumina
Carbon
Corundum

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Refractory Technology
Which of the following has the lowest electrical resistivity?

Graphite
Zircon
Alumina
Fireclay

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Refractory Technology
__________ nozzles are used in continuous casting of steel,

Zircon
Thoria
Carborundum
Beryllia

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