Discussion
Match each calculation with the correction it requires.
List I
A. Weighing out a wet raw material
B. Predicting the fired mass
C. Scaling a recipe to a batch
D. Recovering a recipe from a batch
List II
1. Multiply each percentage by the batch mass
2. Divide by one minus the moisture fraction
3. Divide each mass by the batch total
4. Subtract the loss on ignition
Answer: A
Correct answer: A-2, B-4, C-1, D-3
Four calculations and four operations. A wet material is corrected by dividing by one minus the moisture fraction. A fired mass is obtained by subtracting the loss on ignition. Scaling a recipe to a batch multiplies each percentage by the batch mass. And recovering the recipe from a batch divides each mass by the batch total - the inverse of the third.
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