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Refractory Technology

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

Kyanite
Diaspore
Periclase
Sillimanite

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Refractory Technology
__________ bricks are used in the burning zone of a cement rotary kiln.

Fireclay
Silicon carbide
High alumina
Thoria

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Refractory Technology
Semi-silica bricks compared to silica bricks have

Less fusion point
Both A & B
Neither A nor B
Better spalling resistance

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Refractory Technology
Chrome magnesite is not used in the

All of these
Aluminium melting furnaces
Wear out lining of steel melting furnaces
Inner lining of L.D. converter

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Refractory Technology
Firing of refractory brick is done to

Develop stable mineral forms in them
All of these
Form ceramic bonds necessary for development of high crushing strength in the finished product
Dehydrate the dried refractory

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Refractory Technology
Highest melting (m.p = 3070°C) oxide refractory is

Thoria
Magnesia
Alumina
Zirconia

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