What distinguishes preventive maintenance from corrective maintenance?

• A. Preventive maintenance is more expensive
• B. Preventive maintenance prevents potential issues, while corrective addresses existing problems
• C. Corrective maintenance is performed by civilians only
• D. Preventive maintenance requires lengthy documentation

Answer: (B)

The distinction between preventive maintenance and corrective maintenance lies primarily in their objectives and timing in relation to equipment and systems. Preventive maintenance is designed to avert potential issues before they arise by performing scheduled tasks and inspections. This proactive approach helps ensure that equipment operates efficiently and reduces the risk of unexpected failures.

On the other hand, corrective maintenance is focused on addressing problems that have already occurred. It involves diagnosing and fixing equipment that has failed or is malfunctioning, thus reacting to issues rather than anticipating them.

Understanding this clear division in goals—preventive maintenance aiming to maintain equipment health and prevent breakdowns, while corrective maintenance seeks to restore systems to proper working order after a fault has occurred—highlights why the correct response emphasizes the preventive aspect versus the corrective one. This differentiation is crucial for effective maintenance planning and resource allocation.