Which of the following is NOT a type of preventative maintenance?

Preventative maintenance is aimed at preventing equipment failures and maintaining optimal operation. It encompasses practices that help identify and address potential issues before they result in significant downtime or repairs.

Condition monitoring and inspection involve regularly checking equipment to ensure it is functioning correctly and to identify any potential problems early. Functional testing or failure finding refers to evaluating equipment performance to determine if it is operating as intended, which also helps prevent future failures. Interval based repair or replacement schedules routine work based on the equipment's operating cycle, allowing for parts to be replaced before they fail.

Corrective repairs, on the other hand, are actions taken to fix an issue after a failure has occurred, which is reactive rather than proactive. Therefore, while crucial for overall maintenance management, corrective repairs do not fall under the category of preventative maintenance; they occur in response to problems rather than prevention.