Inspection Planning and Scheduling Flashcards
7 cards from real API 510 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Inspection Planning and Scheduling flashcards as text
Which condition would MOST likely prompt an inspector to specify ultrasonic thickness (UT) scanning rather than spot UT readings in the inspection plan?
Answer: Localized or pitting corrosion with high variability in prior readings
When prior data shows localized or pitting corrosion, scanning covers a larger area to find the minimum thickness rather than relying on spot readings that may miss the worst locations.
An API 510 inspection plan should document which of the following?
Answer: Inspection scope, methods, locations, acceptance criteria, and responsible personnel
A complete inspection plan specifies what will be inspected, which NDE methods will be used, where measurements will be taken, acceptance criteria, and who is responsible.
When should fitness-for-service (FFS) assessment per API 579 be incorporated into inspection planning?
Answer: When inspection reveals damage mechanisms or flaws that may challenge fitness of the vessel
FFS assessment is triggered when inspection findings such as corrosion, cracks, or dents raise questions about whether the vessel can safely continue operation.
For vessels subject to stress corrosion cracking (SCC), which NDE method should be emphasized in the inspection plan?
Answer: Surface examination techniques such as wet fluorescent magnetic particle or liquid penetrant testing
SCC produces tight surface-breaking cracks best detected by wet fluorescent magnetic particle (WFMT) on ferromagnetic materials or liquid penetrant testing (PT) on non-ferromagnetic surfaces.
What action is required under API 510 if actual corrosion is found to exceed the corrosion rate used in the current inspection interval calculation?
Answer: Recalculate remaining life using the updated rate and adjust the next inspection date accordingly
When actual corrosion exceeds the assumed rate, remaining life must be recalculated and the inspection schedule revised to reflect the more aggressive deterioration.
During inspection planning for a vessel with external insulation, which damage mechanism requires special attention?
Answer: Corrosion under insulation (CUI)
Corrosion under insulation (CUI) occurs when moisture penetrates insulation and attacks the external vessel surface, making it a priority concern in planning inspections of insulated vessels.
Which statement best describes the role of process unit history in API 510 inspection planning?
Answer: Process upsets, temperature excursions, and feedstock changes can alter damage rates and should be incorporated into planning
Changes in process conditions, such as feedstock composition or temperature excursions, can accelerate or introduce new damage mechanisms that must be factored into the inspection plan.