Machine Design
Form coefficient of spring is

Ratio of coil diameter to wire diameter
Concerned with strength of wire of spring
Its capability of storing energy
Load required to produce unit deflection

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Machine Design
The flank of the tooth is the

Width of the tooth measured along the pitch circle
Surface of the tooth below the pitch surface
Surface of the tooth above the pitch surface
Surface of the top of the tooth

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Machine Design
Tapered roller bearings can take

Both radial and axial loads and the ratio of these being less than unity
Both radial and axial loads and the ratio of these being greater than unity
Radial load only
Axial load only

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