API API-571 - Corrosion and Materials Professional Exam
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Total 454 questions
Question #1 (Topic: )
Damage from sigma phase appears in the form of ________.
A. Corrosion
B. Hardness
C. Cracking
D. Ductility
Answer: C
Question #2 (Topic: )
The presence of ________ in H²S streams increases the severity of high temperature
sulfide corrosion at temperatures above about 500º F
sulfide corrosion at temperatures above about 500º F
A. Amine
B. Hydrogen
C. Sulfides
D. All of the above
Answer: B
Question #3 (Topic: )
In vessels and piping, creep cracking can occur where high metal temperatures and
_________ occur together.
_________ occur together.
A. Pressures
B. Stress concentrations
C. Velocities
D. None of the above
Answer: B
Question #4 (Topic: )
Many thermal fatigue cracks are filled with:
A. chlorides.
B. hydroslime.
C. oxides.
D. sulfides.
Answer: C
Question #5 (Topic: )
_________ material sections also have a ___________ resistance to brittle fracture due to
higher constraint, which increases triaxial stresses at the crack tip.
higher constraint, which increases triaxial stresses at the crack tip.
A. Thinner, Lower
B. Thicker, Lower
C. Thinner, Higher
D. Thicker, Higher
Answer: B
