Finer particle size of silica______________?
Correct answer: B. Greater the hygroscopic expansion
- A. Slower the hygroscopic expansion
- B. Greater the hygroscopic expansion
- C. Normal setting expansion
- D. No setting expansion
Explanation
Finer silica particles provide greater surface area and promote more interaction with the setting material, increasing hygroscopic expansion. Thus, finer silica produces greater rather than slower expansion.
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