Practice Test Geeks(API 510) API 510 Inspector Certification Practice Test
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Repair, Alteration & Rerating Procedures 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.

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  1. Under API 510, when can PWHT be waived for a repair weld on a vessel that originally required PWHT?

    Answer: When approved by the API 510 inspector and supported by engineering analysis or code alternatives

    PWHT may be waived when alternative measures are approved by the inspector and justified by engineering analysis or applicable code provisions.

  2. A vessel alteration changes the design pressure from 150 psi to 200 psi. According to API 510, the rerating:

    Answer: Requires an engineering review to verify the vessel is suitable for the higher pressure

    Any rerating to higher pressure requires engineering calculations verifying that all components can safely handle the new MAWP.

  3. What is the purpose of a hydrostatic test following a major repair or alteration under API 510?

    Answer: To verify the repair integrity and absence of leaks under pressure

    Post-repair hydrostatic testing verifies the structural integrity of the repaired area and ensures there are no leaks.

  4. When is a pneumatic test permitted instead of a hydrostatic test after a repair, per API 510?

    Answer: When the vessel design or support structure cannot support the water weight, and precautions are taken for the hazard

    Pneumatic tests may substitute for hydrostatic tests when filling with water is impractical, but additional safety precautions are required due to the stored energy hazard.

  5. Under NBIC and API 510, a 'repair' is distinguished from an 'alteration' because a repair:

    Answer: Restores a vessel to its original design condition without changing its pressure-temperature rating or configuration

    A repair restores a vessel to its original design condition, while an alteration changes a design parameter such as MAWP, temperature, or configuration.

  6. When adding a nozzle to an existing pressure vessel (an alteration), the reinforcement calculations must account for:

    Answer: The opening in the shell, nozzle neck, and any reinforcing pad contribution

    Reinforcement area calculations for a new nozzle must consider the material removed from the shell, the nozzle neck thickness, and any reinforcing pad area.

  7. API 510 specifies that temporary repairs such as leak boxes or enclosures must be:

    Answer: Approved by the inspector and have a defined plan for permanent repair

    Temporary repairs must be reviewed and approved by the authorized inspector with documentation of the timeline and plan for permanent correction.