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Refractory Technology

Refractory Technology
High density refractory bricks have lower

Fusion point
Slag penetration resistance
Thermal conductivity
Spalling resistance

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Refractory Technology
Which of the following bricks should not be used, if the furnace is to be used intermit-tantly?

Sillimanite
Silicon carbide bricks
Silica bricks
Firebricks

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Refractory Technology
Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively.

20 and 80
60 and 40
80 and 20
50 and 50

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Refractory Technology
RUL of refractories depends on the

Physical structure
Chemical composition
Presence of impurities like iron & alkali
All of these

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

Firing temperature
Composition
Shape
Texture

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Refractory Technology
Addition of zircon to silica refractory brick improves its

Neither A nor B
Neither A nor B
Crushing strength
Resistance to slag attack

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