API-571

API-571 practice questions, page 16 of 18, with answer review and explanations.

Question 76

________ usually occurs when a colder liquid contacts a warmer metal surface.

  1. Stress cracking
  2. Thermal fatigue
  3. Thermal shock
  4. Stress shock

Question 77

Which of these materials is not susceptible to amine cracking?

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

Question 78

The presence of ________ in H²S streams increases the severity of high temperature sulfide corrosion at temperatures above about 500º F

  1. Amine
  2. Hydrogen
  3. Sulfides
  4. All of the above

Question 79

Increasing chromium content in the alloy improves resistance to sulfidation. However, there is little improvement with increasing chromium content until about ________ Cr.

  1. 3-5
  2. 5-7
  3. 7-9
  4. 9-12

Question 80

_________ is the sudden rapid fracture under stress (residual or applied) where the material exhibits little or no evidence of ductility or plastic deformation.

  1. Thermal fatigue
  2. Thermal shock
  3. Brittle fracture
  4. Stress fracture