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Corrosion and Materials Professional (API-571) - API Exam Questions

Last updated on July 22, 2026

97% Exam Compliance
149 Total Questions
1
Question
Which of the following will be most effective in finding sour water corrosion?
Options
A Angle beam ultrasonic testing
B Profile radiographic testing
C Spot ultrasonic testing
D Guided wave ultrasonic testing
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2
Question
Amine corrosion is primarily caused by:
Options
A alkaline sour water.
B amine concentration.
C dissolved acid gases.
D amine solutions above 250°F (121°C).
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3
Question
Besides corrosion, what other damage mechanism in hydrofluoric (HF) acid service should inspectors be alert to?
Options
A Wet HF cracking
B Fluoride stress cracking
C Stress corrosion cracking
D Hydrogen stress cracking
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4
Question
A nickel-based buttering layer is often used when welding austenitic stainless steels to carbon steels to avoid dissimilar weld metal cracking because:
Options
A You can avoid the need for post weld heat treatment to lower hardness.
B Nickel base alloys are much softer than austenitic stainless steels.
C Austenitic stainless steels are susceptible to chloride cracking.
D The coefficient of thermal expansion is better suited to avoid cracking.
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5
Question
(Creep damage can be mitigated by:)
Options
A Preheating to 500 °F (260 °C) during repair welding
B Postweld heat treatment at 1150 °F (621 °C)
C Removing the damaged material
D Solution anneal heat treatment
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