An indication of degree of firing in silica brick is its
A. Specific gravity
B. Fusion point
C. RUL
D. None of these
Answer: Option A
A. Specific gravity
B. Fusion point
C. RUL
D. None of these
Answer: Option A
Fusion point of an acidic refractory material is
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. None of the above
Which of the following is not a high alumina refractory material?
A. Kyanite
B. Sillimanite
C. Diaspore
D. Periclase
Magnesite refractories are generally not used in the
A. Electric furnace walls
B. Steel melting furnace
C. Open hearth furnace
D. Burning zone of cement kilns
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