At the end of a BAK-12's ten-year service life, the system must undergo what action?

• A. Complete overhaul
• B. No action required
• C. Component replacement only
• D. Full disposal

Answer: (A)

The main idea is that equipment with a fixed service life is brought back to like-new condition through a complete overhaul at the end of that life. After ten years, wear and aging of mechanical parts, insulation, and fittings can affect reliability and safety, so a full disassembly, inspection, and refurbishment are performed. A complete overhaul includes replacing worn components, cleaning, lubricating, recalibrating, and revalidating all functions with thorough testing to ensure the system meets original specifications and safety standards. This approach extends the life of the equipment and reduces the risk of unexpected failure in operation.

No action would leave potential defects hidden and could compromise safety and reliability. Replacing only individual components might not address other degraded parts or misalignments uncovered during a full inspection. Full disposal would waste resources and for most systems, refurbishment via overhaul is the intended path to restore service.