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Refractory Technology

Refractory Technology
Cold crushing strength of refractories depends upon its

Composition
Texture
All of these
Firing temperature

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Refractory Technology
Sillimanite is a __________ refractory.

Basic
Neutral
High alumina
Insulating

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Refractory Technology
Zirconia refractory

Has poor electrical conductivity at high temperature
Is produced from baddeleyite
Does not react with basic slags
Can not be used as an insulator

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Refractory Technology
Cold crushing strength of a refractory does not depend upon its

Texture
Firing temperature
Shape
Composition

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

Beryllia
Zircon
Carborundum
Thoria

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

Thermal conductivity
Density
Specific heat
None of these

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