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REFRACTORY TECHNOLOGY

Refractory Technology
Carbon refractories have very high

Both B and C
Wetting characteristics
Refractoriness
Thermal conductivity

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Refractory Technology
High porosity refractory bricks have

Poor heat conductivity & low strength
Better thermal spalling resistance
All of these
Poor resistance to the peneration of molten slag, metal & flue gases

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Refractory Technology
Which is not a high alumina refractory?

Mullite
Corrundum
Dolomite
Bauxite

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

Graphite
Fireclay
Zircon
Alumina

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Refractory Technology
Periclase is

ZrSO₄
Amorphous magnesite
Crystalline form of MgO
MgCO₃

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