Which of the following does NOT typically represent a hazard in a machine?

Fixed barrier guards are specifically designed to prevent access to hazardous areas of machinery, thereby acting as a safeguard rather than a hazard themselves. These guards are utilized to protect workers from coming into contact with moving parts, nip points, or other potentially dangerous components of machinery. By doing so, they significantly reduce the risk of injury and are an essential aspect of machine safety protocols.

In contrast, the other options represent various types of hazards associated with machinery: nip points can catch clothing or body parts, flying debris can cause injuries if tools or materials are ejected during operation, and incorrect operation of machinery can lead to accidents or malfunctions. Each of these poses a risk to safety, emphasizing the role of fixed barrier guards in mitigating those hazards rather than embodying them.