Maintenance can be preventive or corrective.

• A. True
• B. False
• C. Sometimes
• D. Never

Answer: (A)

Maintenance is usually grouped by when and why the work is done. Preventive maintenance is scheduled work intended to keep equipment from failing, done before any sign of trouble. Corrective maintenance is work performed after a failure or abnormal condition to restore function. The statement that maintenance can be preventive or corrective is true because these are the two primary, real-world ways maintenance is carried out. For example, changing a filter on a regular schedule is preventive, while repairing a machine after it stops working is corrective. In practice, many programs use both approaches, and sometimes add predictive or condition-based maintenance, but the basic idea that maintenance can be preventive or corrective remains correct.