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API 653 ABOVEGROUND STORAGE TANK INSPECTOR · PUBLICATION

API 571 in the API 653 Aboveground Storage Tank Inspector exam

Damage Mechanisms Affecting Fixed Equipment in the Refining Industry. Our API 653 Aboveground Storage Tank Inspector bank draws 464 of its 4,702 questions from this publication — 10% — and they cite 46 different clauses, 20 of them open book. The clause list below is counted from those questions, not copied from a syllabus.

Clauses the questions cite

The 40 most cited of 46, in document order. The number is how many questions in our bank reference that clause.

3.8 · 133.11 · 123.14 · 133.15 · 143.15.1 · 13.15.2 · 13.15.3 · 13.15.4 · 13.15.5 · 13.15.6 · 23.15.7 · 13.15.8 · 13.17 · 53.17.2 · 13.17.3 · 33.19 · 113.20.3 · 13.20.4 · 13.20.6 · 13.22 · 123.27 · 23.28 · 113.35 · 13.36.1 · 13.36.2 · 13.36.4 · 13.36.5 · 23.36.6 · 23.36.7 · 23.45 · 143.57 · 103.61 · 73.61.2 · 13.62 · 83.67 · 13.67.1 · 13.67.2 · 13.67.3 · 13.67.4 · 14.2.1 · 6

What they ask about

Sulfidation 11CUI 10Thermal Fatigue 7Prevention of caustic SCC 7MIC locations in storage tanks 7Caustic corrosion temperature threshold 7Atmospheric corrosion 6Ethanol SCC governing factor 6Caustic gouging concentrating mechanism 6Sulfuric acid material resistance 6Atmospheric corrosion rate by environment 6MIC survival ranges 6Soil-to-air interface 6Caustic SCC at low bulk concentration 6Nature of concentration cell corrosion 6Atmospheric corrosion temperature limit 6Mechanical fatigue 5Cl-SCC 5Wet H2S Damage 5Prevention 5Vintage equipment and brittle fracture 5Ethanol SCC water content window 5CUI temperature ranges by material 5CUI affected materials 5

Free sample questions from API 571

  1. To reduce SSC susceptibility, weld hardness is generally kept:

    • A. Above 350 HB for extra strength
    • B. Between 300 and 400 HB deliberately
    • C. At the maximum achievable hardness
    • D. Unlimited, since hardness does not matter
    • E. At or below about 200 HB ✓

    Keeping hardness at or below about 200 HB (22 HRC), typically via PWHT, controls SSC. Higher hardness increases susceptibility. API 571, Wet H2S Damage (Blistering/HIC/SOHIC/SSC)

  2. A mechanism closely related to atmospheric corrosion under wet insulation is:

    • A. Corrosion under insulation ✓
    • B. High-temperature hydrogen attack
    • C. Sulfidation of hot piping
    • D. Caustic embrittlement of welds
    • E. Graphitization of the base metal

    CUI shares many drivers with atmospheric corrosion but occurs beneath wet insulation. The others are unrelated. API 571, Atmospheric Corrosion

All free API 653 Aboveground Storage Tank Inspector questions

Other publications in this exam

API 653 · 922API 577 · 765ASME IX · 456ASME V · 383API 651 · 333API 652 · 332
API 653 Aboveground Storage Tank Inspector exam guide4,703 API 653 Aboveground Storage Tank Inspector questions

Counts are from AssetronX’s own question bank and describe what we have written, not what the exam contains. AssetronX is an independent examination-preparation provider and is not affiliated with, endorsed by or accredited by any certifying body or standards organisation. The clause numbers refer to the publications’ own paragraphs; the publications themselves are not reproduced here.