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API API-571 Exam Overview:

Certification Vendor:	American Petroleum Institute (API)
Exam Name:	API 571 - Corrosion and Materials Professional Certification Examination
Exam Number:	API-571
Related Certifications:	API 570 Piping Inspector API 653 Aboveground Storage Tank Inspector API 510 Pressure Vessel Inspector
Certificate Validity Period:	3 years
Real Exam Qty:	100
Exam Price:	$900 USD (exam fee through API)
Exam Duration:	3.5 hours (210 minutes)
Passing Score:	Minimum passing score determined by API using the modified Angoff method (typically around 70%)
Exam Format:	Multiple Choice
Available Languages:	English
Sample Questions:	API API-571 Sample Questions
Exam Way:	Computer-Based Testing (CBT) at PSI test centers
Pre Condition:	Candidates must hold a current API 510, 570, or 653 certification to automatically qualify. Otherwise, qualification is based on education and a minimum of 1-5 years of experience in the petrochemical industry acquired within the last 10 years.
Official Syllabus URL:	https://www.api.org/products-and-services/individual-certification-programs/certifications/api571

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API API-571 Prüfungsplan:

Thema	Einzelheiten
Thema 1	Damage Mechanisms: This domain explains various corrosion and damage mechanisms, including their characteristics, affected materials, causes, and visual appearance. It also covers where damage occurs, along with methods for prevention, mitigation, inspection, and monitoring.
Thema 2	Terms, Definitions, and Acronyms: This domain covers the key terminology, standard definitions, and commonly used acronyms related to corrosion and materials. It ensures a clear understanding of technical language used throughout the API-571 body of knowledge.

API Corrosion and Materials Professional API-571 Prüfungsfragen mit Lösungen (Q28-Q33):

28. Frage
In HF service, carbon steel operating above ________ should be closely monitored for loss in thickness and may need to be upgraded to Alloy 400.

A. 200(o) F
B. 175(o) F
C. 150(o) F
D. 160(o) F

Antwort: C

29. Frage
Which of the following is not a primary factor contributing to erosion?

A. Velocity of impacting particles
B. Density of impacting particles
C. Corrosiveness of the environment
D. Size of impacting particles
E. Impact angle (angle that impacting particles strike metal)

Antwort: C

30. Frage
Temper embrittlement is a metallurgical change that is:

A. Readily apparent and can be confirmed through impact testing
B. Readily apparent and can be confirmed through metallography
C. Not readily apparent but can be confirmed through tension testing
D. Not readily apparent but can be confirmed through impact testing

Antwort: D

Begründung:
API RP 571 describes temper embrittlement as a subtle metallurgical change that reduces impact toughness without obvious macrostructural change:
"Temper embrittlement is not readily apparent by visual or standard tensile testing. It is confirmed by Charpy impact testing which measures toughness at low temperatures."
"It typically affects Cr-Mo steels exposed to intermediate temperatures (650°F to 1100°F) for extended times." (Reference: API RP 571, Section 4.2.1.4 - Temper Embrittlement) Thus, the condition is not visually or physically apparent, but is confirmed through impact testing, making option D correct.

31. Frage
(Which of the following would be utilized in prevention or mitigation strategies against hydrochloric acid corrosion?)

A. 300 series stainless steel materials
B. Copper-based materials
C. Nickel-based alloys
D. Duplex stainless-steel materials

Antwort: C

Begründung:
Comprehensive and Detailed Explanation From Exact Extract:
Hydrochloric acid (HCl) corrosion, particularly in crude unit overhead systems, is aggressive toward carbon steel and stainless steels.
According to API RP 571, nickel-based alloys, such as Monel (Ni-Cu alloys), exhibit excellent resistance to hydrochloric acid corrosion and are commonly used for:
* Overhead piping
* Injection quills
* High-risk corrosion zones
Why the other options are incorrect:
* Duplex and 300 series stainless steels are highly susceptible to chloride corrosion and SCC.
* Copper-based materials alone lack sufficient resistance and structural strength in refinery HCl environments.
Referenced Documents (Study Basis):
* API RP 571 - Section on Hydrochloric Acid Corrosion

32. Frage
__________ testing is the best method to determine the susceptibility of a material to hydrogen stress cracking.

A. Hardness
B. Acoustic
C. SWUT
D. AUT

Antwort: A

33. Frage
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