Free API API-571 Exam Actual Questions

The questions for API-571 were last updated On Feb 20, 2025

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Question No. 1

High temperature hydrogen attack results from exposure to hydrogen at elevated temperatures and pressures. The hydrogen reacts with __________ in steel to produce _________, which cannot diffuse through the steel. The loss of carbides causes an overall loss in strength.

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Correct Answer: C

Question No. 2

In order for PASCC to occur the material must be ______.

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Correct Answer: C

Question No. 3

Which of the following materials is not susceptible to SCC?

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Correct Answer: D

Question No. 4

Formation of a metallurgical phase known as sigma phase results in a loss of _________ in some stainless steels as a result of high temperature exposure.

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Correct Answer: B

Question No. 5

Non-stressed relieved __________ is susceptible to stress corrosion cracking when in contact with moist HF vapors in the presence of oxygen.

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Correct Answer: B