Final answer:
The purpose of steam traps is to remove condensate and non-condensibles from steam lines.
Step-by-step explanation:
The purpose of steam traps is to remove condensate and non-condensibles from steam lines. Steam traps are used in steam systems to prevent condensate from accumulating in the steam lines, which can cause damage to the system and impair its efficiency. Non-condensibles, such as air or gases, are also removed by steam traps to ensure the quality and effectiveness of the steam.