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Refractory Technology

Refractory Technology
Carbon refractories have very high

Both B and C
Refractoriness
Wetting characteristics
Thermal conductivity

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Refractory Technology
Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks.

Zirconia
Fireclay
Magnesite
Silica

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Refractory Technology
Which is not a natural insulating material?

Vermiculite
Diatomaceous earth/kieselgur
None of these
Asbestos

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Refractory Technology
Maximum apparent porosity of magnesite bricks is about __________ percent.

44
58
24
8

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Refractory Technology
'Spinel', a refractory mineral is chemically represented as

MgAl2O₃
MgSO₄
MgAl2O₄
MgAl2O₃.2H₂O

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

Carbon
Fireclay
Corundum
85% alumina

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