A closely coiled helical spring is of mean diameter (D) and spring wire diameter (d). The spring index is the ratio of
A. $$\frac{1}{{\text{d}}}$$
B. $$\frac{1}{{\text{D}}}$$
C. $$\frac{{\text{D}}}{{\text{d}}}$$
D. $$\frac{{\text{d}}}{{\text{D}}}$$
Answer: Option C
This Question Belongs to Mechanical Engineering >> Strength Of Materials In ME
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