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Refractory Technology

Refractory Technology
Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for __________ bricks.

Dolomite
Very low alumina
Silica
Fireclay

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Refractory Technology
Magnesite bricks are used in those parts of furnaces, which are

None of these
Required to resist corrosive basic slag
Subjected to temperature fluctuation
Subjected to high load

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Refractory Technology
Silica refractories are not used in

Open hearth furnace roof
Beehive coke ovens
Coke oven walls
Dome and upper portion of B.F. stoves

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Refractory Technology
Zirconia refractories are not used in

Lining high temperature ceramic kilns
High frequency induction furnaces in the form of inductors
Making sheaths for thermocouple
Furnaces subjected to fluctuating temperature

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Refractory Technology
High alumina refractories are used in the

Electric arc furnace roof
Glass melting furnaces
All of these
Dome of blast furnace stoves

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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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