Free API-571 Questions for API Corrosion and Materials Professional API-571 Exam as PDF & Practice Test Engine

Which of the following damage mechanisms are most closely related because they occur in similar environments?

An NPS 3/4 (DN 20) carbon steel unsupported high-point vent on a steam line has failed by cracking.
The most likely cause is:

Hydrogen stress cracking is normally found in:

What is the most effective way to mitigate aqueous organic acid corrosion in overhead streams?

(Which damage mechanism occurs primarily as a result of exposure of interior vessel surfaces to air and moisture conditions during shutdown?)

(Which of the following would be most useful in finding carbolic acid corrosion?)

(A section of vacuum bottom outlet piping is being replaced because of naphthenic acid corrosion (NAC).
Which of the following potential replacement materials would be most resistant to NAC?)

Refer to the following table:
Corroded End - Anodic (More Active)
Magnesium
Magnesium alloys
Zinc
Aluminum
Aluminum alloys
Steel
Cast iron
Type 410 SS (active state)
Ni-Resist
Type 304 SS (active state)
Type 316 SS (active state)
Lead
Tin
Nickel
Brass
Copper
Bronze
Copper-Nickel
Monel
Nickel (passive state)
Type 410 SS (passive state)
Type 304 SS (passive state)
Type 316 SS (passive state)
Titanium
Graphite
Gold
Platinum
Protected End - Cathodic (More Noble)
Which of the following metal combinations is most likely to experience galvanic corrosion in brackish water or seawater?

H#S content, pH, temperature, velocity, and oxygen concentration are critical factors of:

Differential expansion in bimetallic welds can give rise to:

(Amine stress corrosion cracking is found primarily in the:)