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Refractory Technology

Refractory Technology
Vacuum steel degassing units are lined with

Silica bricks
Graphite blocks
High alumina bricks
Low duty firebricks

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Refractory Technology
Machine moulding of dry mixture of refractories requires a pressure of the order of __________ kg/cm².

1000
500
100
10

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Refractory Technology
High thermal conductivity of a refractory material is not important, when it is to be used in the

Coke oven regenarators
Muffle furnace
Blast furnace
Recuperators

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Refractory Technology
Dolomite bricks have good resistance to attack by

Lime slag
None of these
Iron oxide
Molten steel

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Refractory Technology
Fireclay bricks are never used in the

Lead blast furnace
Coke oven walls
Beehive oven
Zinc roaster

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Refractory Technology
Sillimanite is a __________ refractory.

Basic
Insulating
High alumina
Neutral

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