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API 510 PRESSURE VESSEL INSPECTOR · PUBLICATION

API 571 in the API 510 Pressure Vessel Inspector exam

Damage Mechanisms Affecting Fixed Equipment in the Refining Industry. Our API 510 Pressure Vessel Inspector bank draws 456 of its 6,091 questions from this publication — 7% — and they cite 44 different clauses, 12 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 44, in document order. The number is how many questions in our bank reference that clause.

3.3 · 63.8 · 73.9 · 63.11 · 93.15 · 73.15.1 · 13.15.2 · 13.15.3 · 13.15.4 · 13.15.5 · 13.15.6 · 23.15.7 · 13.15.8 · 13.17 · 113.17.2 · 13.17.3 · 33.20.3 · 13.20.4 · 13.20.6 · 13.22 · 83.27 · 83.35 · 13.36 · 93.36.1 · 13.36.2 · 13.36.4 · 13.36.5 · 23.36.6 · 23.36.7 · 23.45 · 13.61 · 193.61.2 · 13.67 · 133.67.1 · 13.67.2 · 13.67.3 · 13.67.4 · 14.2.1 · 64.2.3 · 74.2.10 · 5

What they ask about

Sulfidation 11CUI 10Thermal Fatigue 7Atmospheric corrosion 6Boiler water condensate corrosion appearance 6Amine stress corrosion cracking 6Wet H2S damage governing variable 6Brittle fracture conditions 6Corrosion fatigue definition 6Sulfidation resistance 6Caustic stress corrosion cracking prevention 6Sulfidation cause 6Temper embrittlement temperature range 6Chloride stress corrosion cracking susceptibility 6Wet H2S damage prevention 6Erosion and erosion-corrosion 6Atmospheric corrosion susceptibility 6Creep dependence 6High temperature hydrogen attack appearance 6Mechanical fatigue 5Cl-SCC 5Wet H2S Damage 5Prevention 5Brittle fracture 4

Free sample questions from API 571

  1. Which measure most directly reduces CUI risk on insulated lines?

    • A. Leaving insulation joints open to encourage air ventilation
    • B. Selecting deliberately high-chloride insulation for stainless steel
    • C. Routing steam and deluge water directly over insulated lines
    • D. Sealing jacketing and weatherproofing to exclude water ✓
    • E. Eliminating vapor barriers so that trapped moisture can escape

    Keeping water out - intact sealed jacketing, weatherproofing, and low-chloride insulation for stainless - is the direct control. The other options invite or trap moisture. API 571, Corrosion Under Insulation (CUI)

  2. Amine SCC depends on:

    • A. Only dissolved oxygen with no amine
    • B. Tensile stress, temperature ✓
    • C. Only chlorides with no amine present under typical refinery operating conditions
    • D. Only hydrogen partial pressure
    • E. Only compressive stress in dry gas

    Amine SCC needs tensile stress, sufficient temperature, and the aqueous amine environment. The other combinations do not drive it. API 571, Amine Stress Corrosion Cracking

  3. Which variables influence the different forms of wet H2S damage?

    • A. Environmental conditions
    • B. Material properties
    • C. Stress level
    • D. All of the above ✓
    • E. Hydrogen diffusion rate only

    API 571 states environmental conditions, material properties, and stress level all influence the form and severity of wet H2S damage. API 571, Section 3.67.3

All free API 510 Pressure Vessel Inspector questions

Other publications in this exam

API 510 · 1,555ASME PCC 2 · 805API 577 · 670ASME IX · 456ASME V · 383ASME VIII 1 · 315API 576 · 244
API 510 Pressure Vessel Inspector exam guide6,091 API 510 Pressure Vessel 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.