Discussion
Consider the following statements about clinker assessment.
1. Free lime is measured chemically as an operating control.
2. Microscopy reveals crystal size and cooling history.
3. The Bogue calculation measures phases directly.
Answer: C
The first two are correct. The third confuses calculation with measurement, since Bogue estimates the phases from the oxide analysis using assumptions that a real clinker only approximates. Calculation and measurement answer the same question by different routes.
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