Which statement best describes the difference between hard and soft joints?

The statement indicating that a soft joint requires more turns to reach preload once snug tight is accurate because it describes the characteristic behavior of soft joints under tension. Soft joints, which typically use materials that yield or deform more easily, provide a higher degree of compression as they are tightened compared to hard joints. This means that when a soft joint is being tightened, it can take more turns of the fastener to achieve the necessary preload.

In contrast, hard joints, made from more rigid materials, will reach the desired preload with fewer turns since they do not deform as much under load. This contrast in the physical nature of the materials used in these joints directly affects the installation and torque requirements. Understanding this distinction is critical for ensuring proper assembly and longevity of connections in manufacturing and engineering applications.