API-571

API-571 practice questions, page 9 of 18, with answer review and explanations.

Question 41

Which API RP recommends programs to monitor small-bore piping, flange faces, blistering and HIC/SOHIC in HF alky units?

  1. 574
  2. 751
  3. 571
  4. 980

Question 42

Low creep ductility is __________ severe in high tensile strength materials and welds.

  1. More
  2. Less
  3. Usually
  4. Not

Question 43

_________ is most likely found in hard weld and heat-affected zones and in high strength components.

  1. HIC
  2. SSC
  3. SOHIC
  4. Blistering

Question 44

At elevated temperature, the carbide phases in certain carbon steels are unstable and may decompose into _______. This decomposition is known as graphitization.

  1. Silicon
  2. Graphite nodules
  3. Carbon dust
  4. Graphite dust

Question 45

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.

  1. H²S
  2. Corrosion
  3. Hydriding
  4. Sulfur