API 653 RECERTIFICATION QUIZ QUESTIONS AND 100% CORRECT ANSWERS 2025/2026

API 653 RECERTIFICATION QUIZ QUESTIONS AND 100% CORRECT ANSWERS 2025/2026 Per API 653 , with of the following is required when converting an existing tank to operation at elevated temperatures when it was not originally designed and constructed to API 650, Appendix M? - Answer - The Shell to bottom joint shall be evaluated for fatigue When removing an existing tank bottom, all arc-gouged areas of the tank shell-to-bottom shall be: - Answer -examined using magnetic particle inspection, and defective areas repaired and re-examined. If RBI assessment has been conducted and the tank has cathodic protection plus a thin-film lining, the maximum inspection interval is: - Answer -14 years When installing a new nozzle in a tank of unknow material, what stress value should be used to calculate the required shell thickness and reinforcement? - Answer -20,000 lbf/in2 In regards to underside corrosion on tank bottoms, the corrosion rate of steel in a wet environment. - Answer -may double with every 18 °F increase in temperature above 77 °F.Grade 350W/50W is acceptable for tank plate to a maximum thickness of: - Answer -45mm (1.75in) if fully killed and made to a fine grain practice. If an RBI assessment has been conducted and the tank has a release prevention barrier, the maximum initial inspection interval is: - Answer - 25 years As an alternative to the procedures in API 653 for the evaluation of any thinning of the tank shell below minimu