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Free Corrosion and Materials Professional Practice Questions

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Exam style questions across every API-571 domain

Last Update 9 months ago
Total Questions : 149

Start with our free API-571 practice questions, carefully crafted to mirror the domains, phrasing, and difficulty of the real ICP Programs exam. Each API-571 exam question comes with a detailed rationale that explains not just which answer is correct but why the others fall short. That's how concepts stick. Use the free set to benchmark yourself: identify your API weak domains, see where you're losing marks, and build a focused study plan in minutes.

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Question # 31

(Hydrogen embrittlement of carbon steels is most likely to occur at temperatures of:)

Options:

A.  

850 °F to 1000 °F (454 °C to 538 °C)

B.  

50 °F to 200 °F (10 °C to 93 °C)

C.  

400 °F to 500 °F (204 °C to 260 °C)

D.  

650 °F to 850 °F (343 °C to 454 °C)

Discussion 0
Question # 32

To avoid cooling water scaling, process side inlet temperatures should be below:

Options:

A.  

140°F (60°C)

B.  

150°F (66°C)

C.  

175°F (79°C)

D.  

212°F (100°C)

Discussion 0
Question # 33

Which of the following inspection methods should primarily be used to identify naphthenic acid corrosion (NAC) in a piping system?

Options:

A.  

Radiographic testing followed by ultrasonic measurements

B.  

Angle-beam ultrasonic testing

C.  

Radiographic testing followed by angle-beam ultrasonic testing

D.  

Eddy-current testing

Discussion 0
Question # 34

Proactive and retroactive positive material identification programs are especially useful for services exposed to:

Options:

A.  

Caustic embrittlement

B.  

Ammonia stress corrosion cracking

C.  

Sulfidation

D.  

Sour water

Discussion 0
Question # 35

Spheroidization is a change in the microstructure of steels that can occur after exposure to a minimum temperature of:

Options:

A.  

650°F (345°C)

B.  

700°F (370°C)

C.  

850°F (455°C)

D.  

1000°F (540°C)

Discussion 0
Question # 36

What damage mechanism can occur in wet H₂S environments and is sometimes confused with wet H₂S damage?

Options:

A.  

Ammonia cracking

B.  

HCl cracking

C.  

Amine cracking

D.  

Polythionic cracking

Discussion 0
Question # 37

Amine corrosion occurs principally on what class of materials?

Options:

A.  

Duplex Stainless Steels

B.  

Low Alloy Steels

C.  

Carbon Steels

D.  

Austenitic Stainless Steels

Discussion 0
Question # 38

At which of the following temperatures would the highest atmospheric corrosion rates be expected?

Options:

A.  

175°F (79°C)

B.  

200°F (93°C)

C.  

250°F (120°C)

D.  

275°F (135°C)

Discussion 0
Question # 39

Internal galvanic corrosion in piping near the joint of two dissimilar metals is best detected by external:

Options:

A.  

Liquid-penetrant testing

B.  

Metallographic examination

C.  

Eddy-current testing

D.  

Ultrasonic thickness testing

Discussion 0
Question # 40

Which of the following is the most significant result of spheroidization in steels?

Options:

A.  

Increased potential for stress corrosion cracking

B.  

Increased hardness

C.  

Loss of ductility

D.  

Loss of strength

Discussion 0

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