Q41
Self supporting arches for furnace roofs can be fabricated using silica bricks but not using magnesia bricks. Why?
A.
Silica has a significantly lower thermal expansion coefficient than magnesia at high temperatures
AnswerB.
Silica has a significantly higher thermal conductivity than magnesia at high temperatures
C.
Silica has a significantly lower melting point than magnesia
D.
Silica is significantly more acidic than magnesia
Answer: Option A
Solution
Answer: Option A
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