Which practice involves diagnosing and repairing faults in equipment after a failure?

• A. Preventive Maintenance
• B. Troubleshooting
• C. Blueprint/Schematic
• D. Rigging

Answer: (B)

Troubleshooting is the process of diagnosing why equipment failed and fixing it. When a fault occurs, you collect symptoms, use diagnostic tools to test and observe, trace the issue to its root cause, perform the repair, and then verify the system operates correctly again. This after-failure diagnostic-and-repair work is what makes troubleshooting the best fit for the scenario. Preventive maintenance is about scheduled tasks to prevent failures before they occur. A blueprint or schematic helps you understand wiring and component layout but doesn’t by itself involve diagnosing or repairing faults. Rigging focuses on safely supporting and moving heavy equipment, not diagnosing failures.