Steam traps may also remove _______ from steam lines.

Steam traps are devices designed to allow condensate and non-condensable gases, such as air, to escape from steam lines while preventing the loss of steam. The removal of air from steam lines is crucial because air can accumulate and cause inefficiencies in the steam system. If air is present, it can lead to reduced heat transfer efficiency, as air acts as an insulating barrier. Additionally, the presence of air can result in corrosion within the system and other operational issues. Hence, the primary function of steam traps includes not only the management of condensate but also the expulsion of air that can hinder the performance of the steam system.

The other options present factors that are managed through different means in a steam system. For instance, while it is important to maintain the quality of steam regarding superheat, chemicals, and oil, these are typically addressed by other components or systems rather than being the primary function of a steam trap.