Exam (elaborations)
API 653 EXAM QUESTIONS AND ANSWERS 2024
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API 653 EXAM QUESTIONS AND ANSWERS 2024
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API 653 EXAM1 year - ANSWERS-What is the maximum interval for detailed check of CP
impressed current facilities?
1 year - ANSWERS-What is the maximum interval for CP surveys (Field potential
measurements)?
1 year - ANSWERS-What is the minimum time to keep RTs acquired during tank
repairs and reconstructions?
1 year - ANSWERS-What is the max test interval for Jaeger 2 eye test for Vac Box?
MT/PT?
3 years - ANSWERS-What is the time period between API AI recertifications?
5 years - ANSWERS-What is the maximum interval for UT readings of a tank shell
when the corrosion rate is unknown?
Lesser of 5 years of 1/4 Life - ANSWERS-What is the maximum interval for an
external inspection
,6 years - ANSWERS-What is the time period between API AI on-line
recertifications?
10 years - ANSWERS-What is the initial internal inspection with any bonus?
10 years? - ANSWERS-What is the maximum interval between RBI reassessments?
15 years of 1/2 Life - ANSWERS-What is the maximum interval for UT reading of
the tank shell when the corrosion rate is known?
20 years or full bottom life - ANSWERS-What is the maximum internal interval
without RBI of a tank?
Greater than 20 years - ANSWERS-What is the typical life of a properly applied
tank lining?
1 hour per inch - ANSWERS-What is the normal hold time for a PWHT?
Before and After use - ANSWERS-What is the maximum calibrating interval for the
light intensity of a black light used in a MT/PT exam?
2" of water column - ANSWERS-What is the maximum pressure for an air test of a
tank
,2.5 PSIG - ANSWERS-What is the maximum interval pressure for tanks in API
650/653?
3-5 PSIG, 8-10 PSIG - ANSWERS-What is the normal vacuum required when
vacuum testing? More Sensitive?
15 PSIG - ANSWERS-What is the pressure used when air testing the shell to
bottom weld? (Air between the bottom fillets)
15 PSIG - ANSWERS-What is the test pressure for a repad?
15 PSIG - ANSWERS-What is the maximum internal pressure for tanks in API 620?
1:120 - ANSWERS-What is teh typical minimum upward slope of a tank bottom?
1:16 - ANSWERS-What is the minimum slope of a cone roof tank for water run
off?
2:12 - ANSWERS-What is the maximum roof slope on tanks greater than or equal
to 50' diameter (if roof is considered fragiable)
1:4 - ANSWERS-What is the maximum taper allowed for a shell insert plate?
, 1/4 - ANSWERS-What is the maximum amount of primary seal that can be
removed for a repair while the tank is still in service?
1 - ANSWERS-Minimum number of RTs required on a circular shell replacement
plate?
1 - ANSWERS-What is the current Weld Joint Efficiency "E" ion API 650?
2 - ANSWERS-What is the number of sets of center punch marks located on top
and bottom edges of each shell piece for a tank reconstruction?
2 - ANSWERS-What is the number of tension test to qualify a WSP?
2 - ANSWERS-What is the number of bend test to qualify a welder or welding
operator in welding positions 1G-4G?
Owner/Operator - ANSWERS-Who Determines to use RBI methodologies?
API 580 - ANSWERS-RBI Document - API Code?
Consequence of failure and Likelihood of Failure - ANSWERS-What are the two
factors of Risk?
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