API 571 - Damage Mechanisms - 3.27 - Erosion Erosion-Corrosion Exam Actual Questions and Answers 2026.docx

API 571 - Damage Mechanisms - 3.27 -
Erosion/Erosion-Corrosion Exam
Actual Questions and Answers 2026
The removal of surface material by impacting materials is called:
- Erosion
- Erosion-Corrosion
- Erosion or Erosion-Corrosion
- IPC (imparting particle corrosion) -
correct answer ✅Erosion
(3.27.1.a.1)


The removal of a material's protective scale by impacting materials
is called:
- Erosion
- Erosion-Corrosion
- Erosion or Erosion-Corrosion
- IPRSC (imparting particle removal of scale corrosion) -
correct answer ✅Erosion-Corrosion
(3.27.1.a.2)


Which of the following is NOT a primary factor contributing to
Erosion?

, API 571 - Damage Mechanisms - 3.27 -
Erosion/Erosion-Corrosion Exam
Actual Questions and Answers 2026
- Impact angle (angle that impacting particles strike metal)
- Size of impacting particles
- Velocity of impacting particles
- Density of impacting particles
- Corrosiveness of the process -
correct answer ✅Corrosiveness of the process
(3.27.3.a)


Which of the following best describes the Erosion-Corrosion
process?
- Particles in the process stream wear away the metal
- Particles in the process wear away the scale/corrosion on the
equipment
- Particles in the process wear away the scale/corrosion on the
equipment, exposing bare metal to the corrosion environment
- Particles in the process wear away the scale/corrosion on the
equipment, exposing bare metal to the corrosion environment. The
equipment "recorrodes" and that scale continues to be removed
- Particles in the process wear away the scale/corrosion on the
equipment, exposing bare metal to the corrosion environment. The