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Exam Code:	API-571
Exam Name:	Corrosion and Materials Professional
Certification Provider:	API
Free Question Number:	65
Version:	v2026-04-14
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# of views:	184
# of Questions views:	1666
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Other Version: 153 viewsAPI.API-571.v2026-06-02.q190; 1351 viewsAPI.API-571.v2019-03-23.q272

Exam Question List: Question 1: One way to prevent oxide scale formation on alloy steel is t...; Question 2: What damage mechanism can occur in wet H#S environments and ...; Question 3: (Amine stress corrosion cracking is found primarily in the:)...; Question 4: Cooling water corrosion of exchanger tubes is typically incr...; Question 5: Naphthenic acid corrosion (NAC) is most severe in what phase...; Question 6: Besides corrosion, what other damage mechanism in hydrofluor...; Question 7: Brittle fracture of a component is closely related to:...; Question 8: Hydrogen permeation or diffusion rates associated with wet H...; Question 9: Sigma phase embrittlement can occur in which of the followin...; Question 10: 300 series austenitic stainless steels susceptible to polyth...; Question 11: Proactive and retroactive positive material identification p...; Question 12: What is the best way to inspect for brittle fracture?...; Question 13: (Sulfidation is known to be accelerated by the presence of:)...; Question 14: The most important alloying element for prevention of high-t...; Question 15: Metal dusting usually occurs in the operating temperature ra...; Question 16: What arbitrary value of hydrogen sulfide in water is often u...; Question 17: Steel hardness and strength are critical factors for what ty...; Question 18: A nickel-based buttering layer is often used when welding au...; Question 19: The rate of spheroidization is affected by:...; Question 20: Which of the following is related to all wet H#S damage mech...; Question 21: An inspector observes sharp-edged pitting in piping immediat...; Question 22: Temper embrittlement is a metallurgical change that is:...; Question 23: Which of the following damage mechanisms is related to steel...; Question 24: Convection section soot blowers that have steam supplies wit...; Question 25: The primary cause of ammonium chloride corrosion is the form...; Question 26: (Prevention of high-temperature hydrogen attack is usually a...; Question 27: The most effective means of preventing caustic stress corros...; Question 28: Which of the following is considered resistant to cracking i...; Question 29: Which of the following will experience the highest oxidation...; Question 30: Blistering and hydrogen-induced cracking (HIC) damage are mo...; Question 31: Which of the materials listed are not susceptible to Chlorid...; Question 32: What alloy element most improves naphthenic acid corrosion (...; Question 33: (Typically, surface decarburization will have what effect on...; Question 34: Microbiologically induced corrosion is largely independent o...; Question 35: In what damage mechanism does hydrogen combine with carbides...; Question 36: Which damage mechanism will not benefit much from PWHT mitig...; Question 37: (Graphitization occurs in:); Question 38: To avoid cooling water scaling, process side inlet temperatu...; Question 39: (A metal cracks because of stress relaxation during postweld...; Question 40: (Concentration Cell Corrosion is best described as corrosion...; Question 41: What type of damage is affected by higher hydrogen partial p...; Question 42: Temper embrittlement is defined as:...; Question 43: (Which of the following can be used to confirm 885 °F (475 °...; Question 44: Erosion and erosion-corrosion metal loss is characterized by...; Question 45: (Creep damage can be mitigated by:)...; Question 46: H#S content, pH, temperature, velocity, and oxygen concentra...; Question 47: Phosphoric acid corrosion in polymerization units is usually...; Question 48: The 300 series stainless steels (austenitic stainless steels...; Question 49: (Increased corrosion rates have been observed in equipment a...; Question 50: Caustic corrosion is most often associated with:...; Question 51: (What steel alloy is no longer recommended for services susc...; Question 52: Why are high-cycle fatigue cracks difficult to detect with n...; Question 53: Polythionic acid stress corrosion cracking is:...; Question 54: Corrosion under insulation mitigation is best achieved by:...; Question 55: Which of the following is a critical factor for chloride str...; Question 56: The type of organic acids in crude feedstocks that are of mo...; Question 57: If thermal shock damage may be present, which of the followi...; Question 58: Short-term stress rupture is a/an:...; Question 59: The stream from a crude atmospheric overhead goes to the tub...; Question 60: Which of the following generally manifests itself as a subsu...; Question 61: Severe internal grooving corrosion is found at the bottom of...; Question 62: To detect wet insulation that might give rise to corrosion u...; Question 63: Aggressive ammonium chloride corrosion often occurs:...; Question 64: Cracks formed by carbonate stress corrosion are best detecte...; Question 65: Which of the following can increase the corrosion rate of ca...

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