Free API-571 Exam Braindumps
Corrosion and Materials Professional Questions 206–210 (page: 43)

Updated On: 9-Feb-2026

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.

  1. Less likely
  2. More likely
  3. Not likely
  4. None of the above

Answer(s): B



Hardness is primarily an issue with SSC. Typical low strength carbon steels should be controlled to produce weld hardness less than ________.

  1. 225 BHN
  2. 237 BHN
  3. 200 BHN
  4. 240 BHN

Answer(s): C



Characteristic stress corrosion cracks have many branches and may be visually detectable by a __________ appearance on the surface.

  1. Tree shaped
  2. Craze-cracked
  3. Multiple crack
  4. None of the above

Answer(s): B



Which of these materials are not susceptible to PASCC?

  1. Carbon steel
  2. 300 Series SS
  3. 400 Series SS
  4. Both A and C

Answer(s): D



___________ cooling water outlet temperatures and/or process side outlet temperatures tend to __________ corrosion rates as well as fouling tendency.

  1. Increasing, decrease
  2. Decreasing, decrease
  3. Decreasing, increase
  4. Increasing, increase

Answer(s): D



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