API 653 Recertification Actual Quiz with Answers

API 653 Recertification Actual Quiz with Answers

1. 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?: The Shell to bottom joint shall be evaluated for fatigue 2. When removing an existing tank bottom, all arc-gouged areas of the tank shell-to-bottom shall be:: examined using magnetic particle inspection, and de- fective areas repaired and reexamined. 3. If RBI assessment has been conducted and the tank has cathodic protection plus a thin-film lining, the maximum inspection interval is:: 14 years 4. 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?- : 20,000 lbf/in2 5. In regards to underside corrosion on tank bottoms, the corrosion rate of steel in a wet environment.: may double with every 18 °F increase in temperature above 77 °F. 6. Grade 350W/50W is acceptable for tank plate to a maximum thickness of:: 45mm (1.75in) if fully killed and made to a fine grain practice. 7. If an RBI assessment has been conducted and the tank has a release prevention barrier, the maximum initial inspection interval is:: 25 years 8. As an alternative to the procedures in API 653 for the evaluation of any thinning of the tank shell below minimum required wall thickness may be evaluated for continued service using which code?: API RP 579, section 4, 5 or 6. 9. When welding on a tank shell constructed of Group I steel that is greater than 1.5 inches thick below what minimum metal temperature ?preheat?: - 200°F 10. When evaluated an existing temperature services tank, which has a suc- cessful service history of operation but was not originally designed and constructed to the requirement of API 650, appendix M, which condition temperature has to be used?: The max Operating Temperature shall not exceed the temperature at which the tank has successfully operated in the pass. 11. Flange material used for tank repair and alteration shall meet the minimum requirements for the material specifications according to:: The as built standard 12. which is an advantage of thick film UN-REINFORCED linings ?: Fast curing and can be put back in service after 24 hours at normal ambient temperature. 13. The perimeter welds on a welded-on patch plate in the critical zone should be ?: Two-pass and examined visually and by either MP or PT. 14. Existent welds on a tank shell are found to e closer than allowed by API 650 (7th Edition). Under what conditions can these welds be considered to be