Question Statement:
A helical spring has wire diameter $d = 8\text{ mm}$ and mean coil diameter $D = 48\text{ mm}$. The spring index $C = D/d$ is:
Section 2: Farm Machinery
Subtopic: Measurement of force, stress, torque, speed, displacement and acceleration on machine elements – shafts, couplings, keys, bearings and knuckle joints
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