API 653 Aboveground Storage Tank Inspector Certification Exam

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According to API 653, when should cathodic protection be considered for the external bottom of an aboveground storage tank?

Only when the tank is over 100 ft in diameter When corrosion on the tank bottom is detected or anticipated Only during the initial construction phase Only when the tank stores corrosive products

Correct Answer:

When corrosion on the tank bottom is detected or anticipated

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