Which of the following is the most common face fiber used in carpet construction?

Nylon is the most common face fiber used in carpet construction due to its exceptional durability, resilience, and stain resistance. This synthetic fiber is highly effective at maintaining its appearance over time, making it ideal for high-traffic areas in both residential and commercial settings. Additionally, nylon can be dyed easily, allowing for a wide range of colors and patterns, which adds to its aesthetic appeal. Its ability to withstand wear and tear while retaining its structure and texture makes it a preferred choice for many carpet manufacturers.

Other fibers, such as wool, polyester, and acrylic, have their merits but do not match nylon in terms of overall performance for carpets. Wool is prized for its natural qualities and luxurious feel but is typically more expensive and less durable in high-traffic areas. Polyester offers good stain resistance and is often favored in residential applications, yet it does not provide the same level of durability as nylon. Acrylic can mimic wool's appearance but lacks the strength and resilience required for long-lasting carpets. Thus, nylon's combination of performance characteristics makes it the primary choice for face fiber in carpet production.