Discussion
The shrinkage factor of a drawing is the ratio of the
Answer: C
Correct answer: shrunk length to the original length
The shrinkage factor is the ratio of what a line now measures to what it measured when drawn, so a 20 cm line reading 19.5 cm gives 0.975. Being less than one for a contraction, it can be multiplied directly into the representative fraction, which is what makes it the convenient form of the correction.
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