Define the term "coaxial" in the context of GDandT.

• A. Features that share an equal distance from a common line
• B. Two or more cylindrical features sharing the same centerline
• C. The relationship between two non-intersecting features
• D. Features aligned at right angles to each other

Answer: (B)

The term "coaxial" specifically refers to the relationship between two or more cylindrical features that share the same centerline. In GD&T, identifying features as coaxial is crucial for ensuring proper assembly and function in mechanical components. When features are coaxial, it means they are aligned with each other in such a way that their centerlines coincide, which helps maintain consistent performance and reduces wear caused by misalignment.

This definition emphasizes the importance of centerline alignment, especially in applications where rotational motion, precision fit, and balance are critical. Coaxiality ensures that parts can operate harmoniously, minimizing issues such as vibration or uneven loading during operation.