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Refractory Technology

Refractory Technology
Sillimanite is a __________ refractory.

Basic
High alumina
Insulating
Neutral

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Refractory Technology
Which is required in an insulating refractory?

Low porosity
Neither A nor B
Both A & B
High thermal conductivity

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Refractory Technology
Spalling of a refractory means its

Softening
Resistance to chemical action of gases and molten fluxes
Resistancce to compressive loads
Fracture due to uneven expansion at high temperature

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Refractory Technology
High density refractory bricks have lower

Slag penetration resistance
Fusion point
Thermal conductivity
Spalling resistance

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Refractory Technology
Vacuum steel degassing units are lined with

Low duty firebricks
Silica bricks
Graphite blocks
High alumina bricks

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Refractory Technology
Which of the following is not a high alumina refractory material?

Periclase
Diaspore
Sillimanite
Kyanite

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