California Designated Operator Practice Exam

How often must sacrificial anode systems be checked after installation?

1. Monthly

2. Every 6 months

3. Annually

4. Every 3 years

The correct answer is: Every 3 years

Sacrificial anode systems are an important method of corrosion control, particularly for structures such as pipelines and storage tanks that are in contact with moisture or soil. After their installation, it is recommended to check these systems every three years to ensure they are functioning effectively and providing the intended protection against corrosion. Over time, sacrificial anodes corrode themselves to protect the metal structure, and their effectiveness diminishes as they are consumed. Regular checks allow for monitoring the anodes’ condition, ensuring that they are adequately protecting the underlying metal. Inspections can help identify when anodes need to be replaced before significant corrosion can damage the structure. While other frequencies of inspection might seem reasonable, they may not align with the best practices established by industry standards. Monthly or semiannual inspections could be excessive and may not provide additional benefits, while annual checks might not be frequent enough to detect issues in a timely manner. Hence, the three-year interval strikes a balance between adequate oversight and practical maintenance scheduling.