Which geometric characteristic is not part of the set to control orientation?

• A. Angularity
• B. Parallelism
• C. Position
• D. Perpendicularity

Answer: (C)

The characteristic that is not part of the set used to control orientation is position. The primary geometric characteristics used for controlling orientation are angularity, parallelism, and perpendicularity. These characteristics specifically define how one feature is oriented in relation to another feature, thereby controlling the angular relationship or alignment between them.

Position, on the other hand, is a term that describes the location of a feature rather than its orientation. It indicates the permissible variation in the location of a feature from its true geometric position and does not address how features are oriented relative to one another. This distinction is crucial in geometric dimensioning and tolerancing (GD&T) as it clarifies the purpose of each characteristic.