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Exam2pass > API > API Certifications > API-571 > API-571 Online Practice Questions and Answers

API-571 Online Practice Questions and Answers

Questions 4

Corrosion of the anode may be significantly higher ________ to the connection to the cathode, depending on solution conductivity.

A. Parallel

B. Adjacent

C. Diagonally

D. Perpendicular

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Correct Answer: B

Questions 5

Temperature, ________ and stress are critical factors of stress rupture. This is usually found in furnaces with coking tendencies and fired heater tubes.

A. Pressure

B. Ductility

C. Time

D. Tensile strength

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Correct Answer: C

Questions 6

Which of the following materials are susceptible to polythionic acid SCC?

A. 300 Series SS

B. Alloy 600

C. Alloy 800

D. All of the above

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Correct Answer: D

Questions 7

Amine stress corrosion cracking is a term applied to the cracking of steels under the combined actions of ________ and __________ in aqueous alkanolamine systems used to remove/absorb H²S and/or CO² and their mixtures from various gas and liquid hydrocarbon streams.

A. Temperature, pressure

B. Pressure, stress

C. Temperature, corrosion

D. Tensile stress, corrosion

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Correct Answer: D

Questions 8

Sulfidation of iron-based alloys usually begins at about:

A. 150º F.

B. 250º F.

C. 500º F.

D. 1100º F.

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Correct Answer: C

Questions 9

Mitigation of CUI is best achieved by _________.

A. A properly documented inspection program

B. A properly installed insulation system

C. A properly applied coating system

D. A properly documented NDE program

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Correct Answer: C

Questions 10

The regenerator reboiler and the regenerator are areas where the temperature and __________ of the amine stream are the highest and can cause significant corrosion problems.

A. Pressure

B. Stress

C. Turbulence

D. Concentration

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Correct Answer: C

Questions 11

Refractory anchors must be resistant to __________ in high temperature services.

A. Thermal fatigue

B. Thermal cracking

C. Stress cracking

D. Oxidation

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Correct Answer: D

Questions 12

Alloys with nickel content above _________ are highly resistant to Cl SCC. The greatest susceptibility is 8% to 12% nickel.

A. 15%

B. 20%

C. 30%

D. 35%

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Correct Answer: D

Questions 13

What method is most used to assure boiler feed water corrosion is not occurring?

A. Spot UT readings at turbulent areas

B. Profile RT at turbulent areas

C. Profile RT at stagnant areas

D. Laboratory analysis of boiler feedwater

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Correct Answer: D

Exam Code: API-571
Exam Name: Corrosion and Materials Professional
Last Update: Jul 08, 2025
Questions: 454

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