Which term encompasses the work necessary to keep machinery operating efficiently through prevention, correction, and replacement of parts?

• A. Maintenance
• B. Hazard Analysis
• C. Nominal Voltage
• D. Monitoring

Answer: (A)

Maintenance is the set of activities aimed at keeping equipment running reliably and efficiently. It covers preventive work that stops problems before they start, corrective actions taken after a fault occurs to restore function, and the replacement of worn or failing parts to maintain performance. Together, these tasks form the ongoing effort to preserve the operation of machinery, which is exactly what keeps systems in good working order over time.

Hazard analysis is about identifying potential safety or process risks and assessing their severity and likelihood; it doesn’t describe the ongoing upkeep of equipment. Nominal voltage is a rating used in electrical design and specifications, not the activities that keep machinery functioning. Monitoring means watching conditions or performance, but it doesn’t by itself include performing the maintenance work needed to sustain operation.