API-571

API-571 practice questions, page 12 of 18, with answer review and explanations.

Question 56

Amine stress corrosion cracking is most often associated with lean amine services. The pure alkanolamine does not cause cracking. Cracking in rich amine services are most often associated with _______ problems.

  1. H²S
  2. Stress
  3. Wet H²S
  4. Temperature

Question 57

The loss in strength from spheroidization (Softening) is usually accompanied by a(n) _________ in ductility, which allows for deformation at stress concentrations.

  1. Increase
  2. Decrease
  3. Reduction
  4. Yield

Question 58

Which of the following materials is not susceptible to high temperature hydrogen attack?

  1. 300 Series SS
  2. 5 Cr-1Mo
  3. 9Cr-1Mo
  4. All of the above

Question 59

Which of these materials are susceptible to creep damage?

  1. Carbon steel
  2. Stainless steel
  3. Low alloy steel
  4. All of the above

Question 60

High temperature hydrogen attack results from exposure to hydrogen at elevated temperatures and pressures. The hydrogen reacts with __________ in steel to produce _________, which cannot diffuse through the steel. The loss of carbides causes an overall loss in strength.

  1. Carbides, oxygen
  2. Alloys, hydrogen dioxide
  3. Carbides, methane
  4. Hydrogen dioxide, H²S