AMPP CP1 Tester Practice Questions - AMPP CP1 Cathodic Protection Tester Exam

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A CP tester measures a pipe-to-soil potential of -900 mV vs CSE with the rectifier ON. After instant-off, the potential reads -780 mV vs CSE. Which of the following statements is MOST accurate?

The structure meets the -850 mV polarized criterion The IR drop is 120 mV and the instant-off potential does not meet the -850 mV polarized criterion The structure is overprotected The CSE reference is contaminated

Correct Answer:

The IR drop is 120 mV and the instant-off potential does not meet the -850 mV polarized criterion

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