[2025] New API-571 exam Free Sample Questions to Practice
Cover Real API-571 Exam Questions Make Sure You 100% Pass
Certification Path
The API Corrosion and Materials certification path includes only one API-571 certification exam.
NEW QUESTION # 24
_________ is surface initiated cracks caused by environmental cracking of 300 Series SS and some nickel based alloys under the combined action of tensile stress, temperature and an aqueous chloride environment. The presence of dissolved oxygen increases the propensity for cracking.
- A. SSC
- B. SOHIC
- C. HIC
- D. Cl SCC
Answer: D
NEW QUESTION # 25
Cavitation is a form of erosion caused by the formation and instantaneous collapse of innumerable tiny vapor bubbles. Temperatures approaching the boiling point of the liquid are _________ to result in bubble formation.
- A. None of the above
- B. Less likely
- C. More likely
- D. Not likely
Answer: C
NEW QUESTION # 26
Which of the following damage mechanisms is related to steel hardness?
- A. Sulfide stress corrosion cracking
- B. Hydrogen blistering
- C. Hydrogen-induced cracking
- D. Stress-oriented hydrogen-induced cracking
Answer: A
Explanation:
API RP 571 details that:
"Sulfide Stress Cracking (SSC) susceptibility increases significantly with increased hardness of the steel."
"NACE MR0175/ISO 15156 provides hardness limits for carbon and low-alloy steels to avoid SSC in sour environments. These are typically limited to 22 HRC or 248 Brinell."
"High hardness promotes crack initiation under tensile stress in sour environments (i.e., containing H#S)." (Reference: API RP 571, Section 4.2.2.1 - Sulfide Stress Corrosion Cracking) While hydrogen-induced cracking (HIC) and blistering are related to hydrogen charging, SSC is the only mechanism directly and critically impacted by hardness, making option B correct.
NEW QUESTION # 27
Mechanical fatigue is caused by:
- A. Cyclic stresses occurring over a long period of time.
- B. Constant stresses occurring at low temperatures.
- C. Cyclic operating conditions of bird poop then rain, bird poop then rain, etc.
- D. Higher than average stresses at high temperatures.
Answer: A
NEW QUESTION # 28
Which of the following materials are subject to mechanical fatigue?
- A. Stainless steels
- B. Carbon steels
- C. All of the above
- D. Low alloy steels
Answer: C
NEW QUESTION # 29
Cracks associated with brittle fracture will typically be _________.
- A. Jagged
- B. Straight
- C. Branching
- D. Perpendicular
Answer: B
NEW QUESTION # 30
Which of these cast irons are not susceptible to graphitic corrosion?
- A. None of the above
- B. Black Cast iron
- C. White cast iron
- D. Gray cast iron
Answer: C
NEW QUESTION # 31
With decarburization, the decarburized layer will be free of carbide phases. Carbon steel will be ______.
- A. None of the above
- B. Annealed
- C. Quenched
- D. Pure iron
Answer: D
NEW QUESTION # 32
A steam actuated soot blower has condensate in the first steam exiting the soot blower. What type of damage can be expected to be found when the furnace is brought down for maintenance and inspection?
- A. Creep
- B. Steam blanketing
- C. Thermal fatigue
- D. Stress rupture
Answer: C
NEW QUESTION # 33
Dissimilar metal welds with a 300 Series stainless steel weld metal on a ferritic steel may also result in narrow region of _________ at the toe of the weld, near the fusion line on the ferritic side.
- A. None of the above
- B. Hardness
- C. Ductility
- D. Cracking
Answer: B
NEW QUESTION # 34
If wet electrodes or high moisture content flux is used, ________ can be charged into the steel resulting in delayed cracking.
- A. H2O
- B. Hydrogen
- C. Oxygen
- D. Atomic hydrogen
Answer: B
NEW QUESTION # 35
Hydrogen permeation or diffusion rates associated with wet H#S damage of carbon steel and low-alloy steels have been found to be minimal at a pH of:
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
API RP 571 discusses this under Wet H#S Damage - Hydrogen Blistering, HIC, SOHIC:
"Hydrogen generation is reduced as pH increases. At pH 9 and above, the corrosion potential is less favorable for hydrogen charging and thus permeation into the steel is minimal."
"Most wet H#S cracking damage mechanisms are accelerated under acidic conditions (pH < 7)." Hence, high pH (around 9) environments offer the most protection against hydrogen damage, making option D the correct choice.
NEW QUESTION # 36
The best way to prevent 885(o) F embrittlement is to use low ________ alloys, or to avoid exposing the susceptible material to the embrittling range.
- A. Ferrite
- B. Martensite
- C. Austenite
- D. Chromium
Answer: A
NEW QUESTION # 37
300 Series SS is susceptible to LME when it comes in contact with molten ________.
- A. Cadmium
- B. Zinc
- C. Mercury
- D. Lead
Answer: B
NEW QUESTION # 38
Inspecting for high-cycle fatigue can be difficult since:
- A. Predicting the location of cracking is difficult.
- B. The cracks are extremely tight.
- C. Once the crack begins, only a few cycles are needed for the crack to lead to failure.
- D. Often the equipment is vibrating making non-destructive evaluations difficult.
Answer: C
NEW QUESTION # 39
Spheroidization and graphitization are competing mechanisms that occur at overlapping
temperature ranges. Spheroidization tends to occur preferentially above _______ while graphitization predominates below this temperature.
- A. 1050(o) F
- B. 1000(o) F
- C. 1025(o) F
- D. 1100(o) F
Answer: C
NEW QUESTION # 40
Corrosion under insulation mitigation is best achieved by:
- A. Implementing a carefully planned, periodic inspection program
- B. Using appropriate coatings
- C. Maintaining process temperatures at the boiling point of water
- D. Using low-chloride insulation
Answer: B
Explanation:
According to API RP 571 and API RP 583:
"The most effective mitigation of CUI is the use of appropriate coatings underneath the insulation, which are resistant to moisture and chloride ingress."
"Inspection and insulation selection are also important but are secondary controls." (Reference: API RP 571, Section 4.3.4 - Corrosion Under Insulation; API RP 583) Hence, option D is correct.
NEW QUESTION # 41
Permanent deformation occurring at relatively low stress levels as a result of localized overheating is called
________.
- A. Stress rupture
- B. Brittle fracture
- C. Stress cracking
- D. Temper embrittlement
Answer: A
Explanation:
Explanation
NEW QUESTION # 42
A loss in ductility of high strength steels due to the penetration of atomic hydrogen can lead to brittle cracking called hydrogen embrittlement. Which of the following materials is susceptible to HE.
- A. 400 Series SS
- B. Carbon steel
- C. All of the above
- D. Low alloy steel
Answer: C
NEW QUESTION # 43
......
API-571 Exam topics
Candidates must know the exam topics before they start of preparation. Because it will really help them in hitting the core. Our API-571 exam dumps will include the following topics:
- Determine general damage mechanisms on uniform or localized loss thickness and explain the various types of corrosion related to it.
- Knowledge of general damage mechanisms applicable to the industry and be able to identify their features and functions.
- Possess a general background on the scope, organization and use of API 571 and be able to review the standards and other references related to it.
- Identify the various mechanical and metallurgical failure mechanisms such as brittle fracture, steam blanketing, stress rupture, cracking, thermal shock, fatigue and corrosion.
- Explore damage mechanisms on high temperature corrosion including oxidation, sulfidation, carburization and metal dusting.
- Understand refining industry damage mechanisms used in uniform of localized loss in thickness phenomena.
How to study the API-571 Exam
There are two main types of resources for preparation of certification exams first there are the study guides and the books that are detailed and suitable for building knowledge from ground up then there are video tutorial and lectures that can somehow ease the pain of through study and are comparatively less boring for some candidates yet these demand time and concentration from the learner. Smart Candidates who want to build a solid foundation in all exam topics and related technologies usually combine video lectures with study guides to reap the benefits of both but there is one crucial preparation tool as often overlooked by most candidates the practice exams. Practice exams are built to make students comfortable with the real exam environment. Statistics have shown that most students fail not due to that preparation but due to exam anxiety the fear of the unknown. GuideTorrent expert team recommends you to prepare some notes on these topics along with it don't forget to practice API-571 Exam exam dumps which been written by our expert team, Both these will help you a lot to clear this exam with good marks.
Real API-571 Quesions Pass Certification Exams Easily: https://examcollection.guidetorrent.com/API-571-dumps-questions.html