Explain how to determine whether a straightness tolerance is applied to a surface element or a feature of size.

What will be an ideal response?


ANS:
The interpretation of a straightness tolerance is different based on whether the control applies to surface elements or a feature of size.

The location of a straightness tolerance indicates what it is applied to. When the leader line of a straightness tolerance is directed to a surface – or attached to an extension line from the surface – it indicates that it apples to the surface elements. When a straightness tolerance is located beneath or beside a size dimension, it indicates that it applies to the feature of size.

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