Which of the following is a method to prevent water contamination in oil?

Inspecting covers and hatches is a crucial method for preventing water contamination in oil systems. It ensures that any seals, gaskets, or covers that are supposed to protect the oil from external elements are intact and functioning properly. When these components are compromised, water can seep into the oil reservoir, leading to contamination that can adversely affect the lubricant’s performance and the overall reliability of machinery. Regular inspections can identify potential weaknesses before they lead to significant issues.

In contrast with this method, simply adding more oil may not address existing contamination and can even introduce more issues if the already contaminated oil isn't addressed. High-temperature lubricants are designed to perform in elevated temperature conditions but do not directly relate to preventing water contamination. Draining oil regularly can help manage contamination effectively but is more of a response to issues rather than a preventative measure, highlighting the importance of proactive inspections.