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API API-571 Exam Syllabus Topics:

Section	Weight	Objectives
High-Temperature Corrosion and Degradation	15%	- Carburization - Decarburization - Metal Dusting - Graphitization
Other Damage Mechanisms	15%	- Liquid Metal Embrittlement - Cavitation Damage - Microbiologically Influenced Corrosion - Erosion and Erosion-Corrosion
Terms, Definitions, and Acronyms	5%
Mechanical and Metallurgical Failure Mechanisms	15%	- Brittle Fracture - Creep and Stress Rupture - Thermal Fatigue - Mechanical Fatigue
Environmentally Assisted Cracking	25%	- Hydrogen Embrittlement - Chloride Stress Corrosion Cracking - Sulfide Stress Cracking - Caustic Stress Corrosion Cracking
Uniform or Localized Loss of Thickness	25%	- Oxidation and Scaling - Corrosion Under Insulation (CUI) - Hydrochloric Acid Corrosion - Sulfidation - Ammonium Bisulfide Corrosion

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API Corrosion and Materials Professional Sample Questions (Q147-Q152):

NEW QUESTION # 147
Naphthenic acid corrosion is a form of high temperature corrosion that occurs primarily in crude and vacuum units and downstream units that process certain fractions that contain naphthenic acid. Which of the following materials is susceptible to naphthenic acid corrosion?

A. All of the above
B. Carbon steel
C. 400 Series SS
D. 300 Series SS

Answer: A

NEW QUESTION # 148
__________ is a change in the microstructure of steels after exposure in the 850º F to 1400º F range, where the carbide phases in carbon steels are unstable and may agglomerate from their normal plate-like appearance.

A. Spheroidization
B. 885º Embrittlement
C. Carburization
D. Graphiding

Answer: A

NEW QUESTION # 149
Which of these materials are not susceptible to PASCC?

A. Carbon steel
B. 400 Series SS
C. 300 Series SS
D. Both A and C

Answer: D

NEW QUESTION # 150
Which of the following is the lowest threshold temperature at which creep damage is a concern in carbon steel with tensile strength > 60ksi (414 MPa)?

A. 600°F (316°C)
B. 700°F (371°C)
C. 800°F (427°C)
D. 900°F (482°C)

Answer: B

Explanation:
API RP 571 states in the section on Creep Damage:
"Creep damage in carbon steels generally becomes a concern above 700°F (371°C), especially for steels with higher tensile strength (greater than 60 ksi)."
"For prolonged exposure above this temperature, time-dependent deformation can lead to material degradation and cracking, especially at weldments and stress concentrations." Thus, the lowest threshold for creep in high-strength carbon steels is 700°F (371°C), making option B correct.

NEW QUESTION # 151
A prime location for erosion is:

A. In catalyst piping.
B. Downstream of a gate valve.
C. Any superheated steam piping.
D. Upstream of a pump.

Answer: A

NEW QUESTION # 152
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