Refractory Technology MCQ Questions & Answers

1.
Highest melting (m.p = 3070°C) oxide refractory is

A. Alumina

B. Thoria

C. Zirconia

D. Magnesia

A. Increased by the addition of basic oxides

B. Reduced by the addition of basic oxides

C. Not affected by the addition of basic oxides

D. Not affected by the addition of basic oxides

A. Kyanite

B. Sillimanite

C. Diaspore

D. Periclase

A. Electric furnace walls

B. Steel melting furnace

C. Open hearth furnace

D. Burning zone of cement kilns

A. Beehive coke ovens

B. By-product coke ovens

C. Dome of blast furnace stoves

D. Roof of open hearth furnace

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