Which of the following is an example of preventive maintenance?

The scheduled replacement of minor parts that wear out quickly embodies the essence of preventive maintenance. This approach focuses on carrying out maintenance activities at predetermined intervals or according to specific criteria, intending to prevent equipment failure before it occurs. By proactively replacing these parts, which are known to have a limited lifespan, the likelihood of unexpected breakdowns is considerably reduced. This kind of strategy ensures that equipment remains operational and efficient over time, ultimately contributing to higher productivity and lower operating costs.

In contrast, repairing broken equipment after failure is a reactive approach that does not fall under preventive maintenance since it addresses issues only after they arise. Cleaning the workspace regularly, while important for safety and operational efficiency, does not directly relate to equipment maintenance. Random maintenance checks on machinery can be helpful but may not be structured enough to constitute a preventive maintenance strategy, which relies on scheduled and planned tasks to mitigate potential problems.