Ultimate Guide to Prepare API-571 Certification Exam for ICP Programs in 2026
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Certification Path
The API Corrosion and Materials certification path includes only one API-571 certification exam.
NEW QUESTION # 40
Hydrogen permeation or diffusion rates have been found to be minimal at pH _______ and increase at both higher and lower pH's.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 41
Corrosion by HF (Hydrofluoric) acid can result in high rates of general or localized corrosion and may be accompanied by hydrogen cracking, blistering and ________.
- A. SOHIC
- B. HIC
- C. Both A and C
- D. Delayed cracking
Answer: C
NEW QUESTION # 42
Carbon dioxide (CO2) corrosion results when CO2 dissolves in water to form ________.
- A. Carbonic acid
- B. None of the above
- C. Carbon monoxide
- D. Hydrofluoric acid
Answer: A
NEW QUESTION # 43
In fired heater tubes, dissimilar weld metal cracking forms primarily on the _______ of the material.
- A. All of the above
- B. Outside
- C. Inside
- D. Welds
Answer: B
NEW QUESTION # 44
Which of the following alkanolamine systems is the most aggressive in causing amine corrosion?
- A. Monoethanolamine (MEA)
- B. Diethanolamine (DEA)
- C. Diglycolamine (DGA)
- D. Methyldiethanolamine (MDEA)
Answer: A
NEW QUESTION # 45
All piping and equipment exposed to HF acid at any concentration with hardness levels above the recommended limit (237 BHN) are subject to _________.
- A. Hydrogen stress cracking
- B. Sulfide stress cracking
- C. None of the above
- D. Chloride stress cracking
Answer: A
NEW QUESTION # 46
Which of these materials are susceptible to creep damage?
- A. Carbon steel
- B. Stainless steel
- C. All of the above
- D. Low alloy steel
Answer: C
NEW QUESTION # 47
Cracking of dissimilar weld metals occurs on the _________ side of a weld between an austenitic and a Ferritic material operating at high temperatures.
- A. Austenitic
- B. Cathodic
- C. Ferritic
- D. Anodic
Answer: C
NEW QUESTION # 48
The best way to prevent 885º F embrittlement is to use low ________ alloys, or to avoid exposing the susceptible material to the embrittling range.
- A. Chromium
- B. Austenite
- C. Ferrite
- D. Martensite
Answer: C
NEW QUESTION # 49
_________ is the main concern during start-up, shutdown and/or hydro testing for equipment/piping operating at elevated temperatures. This event can also occur in an auto refrigeration event in units processing light hydrocarbons.
- A. Stress fracture
- B. Carburization
- C. Spheroidization
- D. Brittle fracture
Answer: D
NEW QUESTION # 50
Ammonium chloride corrosion is the general or localized corrosion, often pitting, normally occurring under ammonium chloride or amine salt deposits. All commonly used materials are susceptible to ammonium chloride corrosion. A small amount of _________ can lead to very aggressive corrosion.
- A. Water
- B. Amine
- C. Salt
- D. Ammonium chloride
Answer: A
NEW QUESTION # 51
Boiler water condensate corrosion is caused primarily by:
- A. High pH from water treatment problems
- B. Carbon dioxide and oxygen
- C. Sodium sulfites or hydrazines
- D. Dissolved iron oxides
Answer: B
Explanation:
According to API RP 571, in the section on Boiler Water Condensate Corrosion:
"The major contributors to condensate corrosion are dissolved CO# and O#. Carbon dioxide forms carbonic acid in the presence of water, lowering pH and causing generalized corrosion."
"Oxygen causes pitting and localized corrosion unless chemically treated." Thus, option B (Carbon dioxide and oxygen) is the primary root cause and the correct answer.
NEW QUESTION # 52
The signature mark of a fatigue failure is a _______ type fingerprint that has concentric rings.
- A. Clam Shell
- B. Radii
- C. Eyebrow
- D. Half-Moon
Answer: A
NEW QUESTION # 53
Refractory lined equipment should be designed for erosion, thermal shock and __________.
- A. All of the above
- B. Thermal expansion
- C. Thermal contraction
- D. Thermal fatigue
Answer: B
Explanation:
Explanation
NEW QUESTION # 54
In order for PASCC to occur the material must be ______.
- A. Austenitic
- B. PWHT
- C. Non-PWHT
- D. Sensitized
Answer: D
NEW QUESTION # 55
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