API API-571 - Corrosion and Materials Professional Exam

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Total 454 questions

Damage from sigma phase appears in the form of ________.

  • A. Corrosion
  • B. Hardness
  • C. Cracking
  • D. Ductility


Answer : C

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

  • A. Amine
  • B. Hydrogen
  • C. Sulfides
  • D. All of the above


Answer : B

In vessels and piping, creep cracking can occur where high metal temperatures and
_________ occur together.

  • A. Pressures
  • B. Stress concentrations
  • C. Velocities
  • D. None of the above


Answer : B

Many thermal fatigue cracks are filled with:

  • A. chlorides.
  • B. hydroslime.
  • C. oxides.
  • D. sulfides.


Answer : C

_________ material sections also have a ___________ resistance to brittle fracture due to higher constraint, which increases triaxial stresses at the crack tip.

  • A. Thinner, Lower
  • B. Thicker, Lower
  • C. Thinner, Higher
  • D. Thicker, Higher


Answer : B

Page:    1 / 91   
Total 454 questions