Latest [Apr 12, 2024] API-571 Exam Questions – Valid API-571 Dumps Pdf
API-571 Practice Test Questions Answers Updated 455 Questions
NEW QUESTION # 221
Corrosion in boiler feedwater and condensate return systems is usually the result of dissolved gases, oxygen and ________.
- A. H²S
- B. Carbon monoxide
- C. Material properties
- D. Carbon dioxide
Answer: D
NEW QUESTION # 222
Cracking can occur at low caustic levels if a concentrating mechanism is present. In such cases, caustic concentrations of ________ ppm are sufficient to cause cracking.
- A. 150-200
- B. 50-100
- C. 100-150
- D. 200-250
Answer: B
NEW QUESTION # 223
Which of the following does not increases the likelihood of atmospheric corrosion?
- A. Increasing annual rainfalls
- B. Increasing amounts of airborne contaminates
- C. Locations where moisture is trapped
- D. Bird poop
- E. Increasing operating pressures
Answer: E
NEW QUESTION # 224
Which material below is not susceptible to caustic corrosion?
- A. Carbon steel
- B. 300 Series SS
- C. 400 Series SS
- D. Low alloy steel
Answer: C
NEW QUESTION # 225
Sulfidation is primarily caused by ________ and other reactive sulfur species as a result of the thermal decomposition of sulfur compounds at high temperatures.
- A. Sulfur dioxide
- B. Sulfates
- C. H2S
- D. Sulfur trioxide
Answer: C
NEW QUESTION # 226
MIC is often found in _________, bottom water of storage tanks, piping with stagnant or low flow and piping in contact with some soils.
- A. All of the above
- B. Heat exchangers
- C. Drums
- D. Vessels
Answer: B
NEW QUESTION # 227
What standard refers to Risk-Based-Inspection?
- A. RP 568
- B. RP 579
- C. RP 588
- D. RP 581
Answer: D
NEW QUESTION # 228
Cadmium and lead will cause LME on _____________.
- A. Copper alloys
- B. Aluminum alloys
- C. High strength steel
- D. 300 Series SS
Answer: C
NEW QUESTION # 229
Sour water corrosion in _________ containing environments may be accompanied by carbonate SCC.
- A. H(2)S
- B. CO(2)
- C. O(2)
- D. H(2)O
Answer: B
NEW QUESTION # 230
The effects of hydrogen embrittlement ___________ with _________ temperatures.
- A. Decrease, decreasing
- B. Increase, increasing
- C. Decrease, increasing
- D. Increase, decreasing
Answer: C
NEW QUESTION # 231
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 # 232
Graphitization can be prevented by using chromium containing low alloys steels for long-term exposure above
________.
- A. 800º F
- B. 650º F
- C. 750º F
- D. 700º F
Answer: A
NEW QUESTION # 233
The best method to inspect for SCC is ____.
- A. UT Shear wave
- B. All of the above
- C. AET
- D. WFMT
Answer: D
NEW QUESTION # 234
Which of these materials are susceptible to brittle fracture?
- A. Low alloy steels
- B. 400 Series SS
- C. Carbon steels
- D. All of the above
Answer: D
NEW QUESTION # 235
In design and fabrication, it is advisable to avoid sharp changes in cross section, such as short radius fillets or undercut that can give rise to _________.
Long-seam welds are particularly susceptible to reheat cracking due to mismatch caused by fit up problems.
- A. Circumferential stress
- B. Stress concentrations
- C. Cracking
- D. All of the above
Answer: B
NEW QUESTION # 236
Corrosion protection in the boiler is accomplished by laying down and continuously maintaining a layer of _____.
- A. Carbon monoxide
- B. Magnetite
- C. Carbonate
- D. Manganese
Answer: B
NEW QUESTION # 237
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