Exam Overview
| Exam Code | API-571 |
| Exam Name | API Corrosion and Materials |
| Vendor | API |
| Total Questions | 454 |
| Last Updated | 26-Oct, 2026 |
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Free API-571 Practice Questions
Explore 4 free practice questions for the API API-571 exam and review the answers and explanations to support your preparation.
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Question 1
Single answerWhat structure is 410 stainless steel?
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Option A:Correct
Martensitic
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Option B:Correct
Austenitic
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Option C:Correct
Duplex
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Option D:Correct
Ferritic
Show Answer & Explanation Hide Answer & Explanation
Correct Answer: A
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Question 2
Single answerorganic compounds or microbiological activities is called
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Option A:Correct
Flue Gas Corrosion
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Option B:Correct
Atmospheric Corrosion
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Option C:Correct
Cooling Water Corrosion
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Correct Answer: C
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Question 3
Single answeris the result of cyclic stress caused by variations in temperature.
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Option A:Correct
Creep
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Option B:Correct
Thermal Fatigue
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Option C:Correct
Cyclic Cracking
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Option D:Correct
Stress Corrosion Cracking
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Correct Answer: B
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Question 4
Single answerWhat structure is 304 stainless steel?
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Option A:Correct
Martensitic
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Option B:Correct
Austenitic
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Option C:Correct
Duplex
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Option D:Correct
Ferritic
Show Answer & Explanation Hide Answer & Explanation
Correct Answer: B
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