API Corrosion and Materials Professional API-571 Dumps in PDF

Free API API-571 Real Questions (page: 15)

Which of the following alkanolamine systems is the most aggressive in causing amine corrosion?

  1. Monoethanolamine (MEA)
  2. Diglycolamine (DGA)
  3. Diethanolamine (DEA)
  4. Methyldiethanolamine (MDEA)

Answer(s): A



________ is a loss in toughness due to a metallurgical change that can occur in alloys containing a ferrite phase, as a result of exposure in the temperature range 600º F to 1000º F.

  1. Caustic embrittlement
  2. Notch toughness
  3. 885º F embrittlement
  4. Ductile embrittlement

Answer(s): C



Hydrochloric acid corrosion is a general and localized corrosion and is very aggressive to most common materials of construction. Damage in refineries is often associated with dew point corrosion in which vapors containing _______ and hydrogen chloride condense from the overhead stream of a distillation, fractionation, or stripping tower.

  1. O²
  2. O
  3. H²O
  4. CO²

Answer(s): C



When connected to a more anodic material, titanium may suffer severe __________.

  1. Corrosion
  2. Hydriding
  3. Stress
  4. Notch toughness

Answer(s): B



__________ is a form of stress corrosion cracking normally occurring during shutdowns, startups or during operation when air and moisture are present. Cracking is due to sulfur acids forming from sulfide scale, air and moisture acting on sensitized stainless steel.

  1. Caustic SCC
  2. Chloride SCC
  3. Polythionic acid SCC
  4. None of the above

Answer(s): C



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1/16/2024 9:19:00 PM

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