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NEW QUESTION # 147
If wet electrodes or high moisture content flux is used, ________ can be charged into the steel resulting in delayed cracking.
- A. Oxygen
- B. Atomic hydrogen
- C. Hydrogen
- D. H(2)O
Answer: C
NEW QUESTION # 148
For pressure vessels, inspection should focus on welds of ________ operating in the creep range.
- A. Carbon steel
- B. Low hydrogen electrodes
- C. CrMo alloys
- D. Stainless steel
Answer: C
NEW QUESTION # 149
Sulfidation of iron-based alloys usually begins at about:
- A. 150 oF.
- B. 500 oF.
- C. 1100 oF.
- D. 250 oF.
Answer: B
NEW QUESTION # 150
A form of corrosion that can occur at the junction of dissimilar metals when they are joined together in a suitable electrolyte is __________.
- A. Cathodic corrosion
- B. Anodic corrosion
- C. Galvanic corrosion
- D. All of the above
Answer: C
NEW QUESTION # 151
Graphitization can be prevented by using chromium containing low alloys steels for long-term exposure above ________.
- A. 800(o) F
- B. 750(o) F
- C. 700(o) F
- D. 650(o) F
Answer: A
NEW QUESTION # 152
Which of these materials are susceptible to creep damage?
- A. Carbon steel
- B. All of the above
- C. Low alloy steel
- D. Stainless steel
Answer: B
NEW QUESTION # 153
Steel cleanliness and _______ have a significant influence on toughness and resistance to brittle fracture.
- A. None of the above
- B. Grain size
- C. Composition
- D. Alloy
Answer: B
NEW QUESTION # 154
With short term overheating, time to failure will ___________ as internal pressures or loading decrease.
- A. Decrease
- B. None of the above
- C. Remain the same
- D. Increase
Answer: D
NEW QUESTION # 155
_______ is the primary alloying agent that affects resistance to oxidation.
- A. Chromium
- B. Silicon
- C. Aluminum
- D. Molybdenum
Answer: A
NEW QUESTION # 156
Phosphoric acid corrosion is usually found in ________ areas.
- A. High velocity
- B. Low velocity
- C. High temperature
- D. Low temperature
Answer: B
NEW QUESTION # 157
Foul smelling water may be a sign of fouling and/or _______
- A. MIC
- B. HIC
- C. SOHIC
- D. All of the above
Answer: A
NEW QUESTION # 158
Cooling water corrosion and __________ are closely related and should be considered together.
- A. Erosion
- B. Fouling
- C. Velocity
- D. Stress
Answer: B
NEW QUESTION # 159
Thermal fatigue cracks usually:
- A. Grow very rapidly (at the speed of sound in the material).
- B. Initiate on the surface of the component.
- C. Are very tight and narrow.
- D. Initiate in the subsurface of the component.
Answer: B
NEW QUESTION # 160
Hydrogen blisters may form as surface bulges on the ID, the OD on within the wall thickness of a pipe or pressure vessel. Blistering occurs from hydrogen generated by ______, not hydrogen gas from the process stream.
- A. H²S
- B. Sulfur
- C. Hydriding
- D. Corrosion
Answer: D
NEW QUESTION # 161
Mechanical fatigue can cause cracks that initiate from the surface and often form a:
- A. Clam shell appearance.
- B. Snail shell appearance.
- C. Taco shell appearance.
- D. Turtle shell appearance.
- E. Shell Oil shell appearance.
Answer: A
NEW QUESTION # 162
Oxygen and iron in the wash water injected into reactor effluent can lead to __________ corrosion and fouling.
- A. Substantial
- B. Decreased
- C. Minimal
- D. Increased
Answer: D
NEW QUESTION # 163
Which of these materials exhibit an endurance limit below which fatigue cracking will not occur?
- A. None of the above
- B. Carbon steel
- C. 300 Series SS
- D. 400 Series SS
Answer: B
NEW QUESTION # 164
Titanium should not be used in known hydriding services such as _____ or ______.
- A. Sour water, Alkylation
- B. All of the above
- C. Amine, sour water
- D. Caustic, amine
Answer: C
NEW QUESTION # 165
With short term overheating, time to failure will ___________ as internal pressures or loading decrease.
- A. Decrease
- B. None of the above
- C. Remain the same
- D. Increase
Answer: D
NEW QUESTION # 166
______ is most likely found in hard welds and heat affected zones and in high strength components.
- A. SSC
- B. Carburization
- C. HIC
- D. SOHIC
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION # 167
MIC is often found in _________, bottom water of storage tanks, piping with stagnant or low flow and piping in contact with some soils.
- A. Heat exchangers
- B. Vessels
- C. Drums
- D. All of the above
Answer: A
NEW QUESTION # 168
What test is used to determine a material's toughness?
- A. Tension test
- B. Guided bend test
- C. Charpy impact test
- D. Metallography
- E. Physical fitness test
Answer: C
NEW QUESTION # 169
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API Corrosion and Materials API-571 Exam
API Corrosion and Materials API-571 Exam is related to Advanced Corrosion & Materials Professional Certifications. This exam validates the knowledge and skills of corrosion engineers, corrosion processes among specialized inspectors, chemical engineers and other professionals across the entire petrochemical industry. Highly Specialized Inspectors, Corrosion Engineers and Chemical Engineers usually hold or pursue this certification and you can expect the same job role after completion of this certification.
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API-571 practice test questions, answers, explanations: https://drive.google.com/open?id=1_shhXTEbnVEIC8Jw81KCuHHonSakV3VN