How is angularity typically expressed?

How is angularity typically expressed?

• A. As a tolerance on the angle between a feature axis and a datum plane, usually in degrees.
• B. As a distance tolerance along the feature’s axis.
• C. As a diameter tolerance around a circular feature.
• D. As a tolerance on the roundness of the feature.

Answer: (A)

Angularity controls how a feature’s axis tilts relative to a datum plane, by limiting the angle between the axis and that plane. The tolerance is given as an angular value, typically in degrees, so the axis must stay within that angular band from the reference plane. This keeps the feature oriented correctly in relation to the datum, independent of its size or exact location. The other concepts don’t fit because a distance tolerance along the axis would govern length or position along the axis rather than tilt; a diameter tolerance addresses the size of a circular feature; and a roundness tolerance fixes how circular the surface is, which are all about size or form, not orientation.

Angularity controls how a feature’s axis tilts relative to a datum plane, by limiting the angle between the axis and that plane. The tolerance is given as an angular value, typically in degrees, so the axis must stay within that angular band from the reference plane. This keeps the feature oriented correctly in relation to the datum, independent of its size or exact location.

The other concepts don’t fit because a distance tolerance along the axis would govern length or position along the axis rather than tilt; a diameter tolerance addresses the size of a circular feature; and a roundness tolerance fixes how circular the surface is, which are all about size or form, not orientation.