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Refractory Technology

Refractory Technology
Vacuum steel degassing units are lined with

High alumina bricks
Silica bricks
Graphite blocks
Low duty firebricks

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Refractory Technology
Which of the following is not a high alumina refractory material?

Kyanite
Sillimanite
Periclase
Diaspore

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

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

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Refractory Technology
Which is not a basic refractory?

Silicon carbide
Dolomite
Magnesite
Chrome magnesite

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

44
24
8
58

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Refractory Technology
PCE value (Segar cone) of superduty refractories is more than 33, which is equivalent to a temperature of __________ °C.

1630
1730
1520
1670

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