What is a consequence of setting the pins of a knee kicker or power stretcher too shallow?

Setting the pins of a knee kicker or power stretcher too shallow can result in the release of tufts from the carpet. When the pins are not engaged deeply enough into the carpet backing, they may not hold the fibers securely. As a result, when tension is applied during stretching, the fibers can pull free, leading to tuft loss. This not only affects the aesthetic appeal of the carpet but can also impact its overall durability.

The other choices relate to aspects of carpet installation but do not directly connect to the consequence of shallow pin engagement. For example, increased tension or difficulty in installation might occur due to other factors such as improper technique or equipment settings, but the primary issue with shallow pin settings is specifically the failure to adequately secure the tufts in place. Similarly, while damage to the underlay can occur with improper stretching, it does not specifically denote the consequence of shallow pin settings. The focus on tufting makes the release of tufts the most appropriate consequence in this scenario.