Which of the following is NOT a primary function of a steam trap?

The correct answer identifies that increasing steam pressure is not a primary function of a steam trap. Steam traps are designed primarily to manage condensate and ensure the efficient functioning of steam systems. Their main roles include releasing condensate, conserving steam by preventing steam loss, and removing air and non-condensable gases from the system.

By allowing condensate to exit the system while retaining steam, steam traps help maintain the efficiency and effectiveness of the steam system without causing pressure buildup or energy loss. Therefore, their function revolves around managing steam and condensing gases, rather than manipulating pressure directly, which is typically handled by other components such as pressure regulators or control valves.