Online Access Free API-571 Exam Questions

Amine corrosion occurs principally on what class of materials?

• A.Duplex Stainless Steels
• B.Low Alloy Steels
• C.Carbon Steels
• D.Austenitic Stainless Steels

Which of the following is a contributing factor in caustic corrosion?

• A.Alkalinity of superheated steam
• B.Boiler feed water hardness
• C.Iron oxide concentration
• D.Heat traced equipment

Corrosion under insulation mitigation is best achieved by:

• A.Using appropriate coatings
• B.Maintaining process temperatures at the boiling point of water
• C.Using low-chloride insulation
• D.Implementing a carefully planned, periodic inspection program

Proactive and retroactive positive material identification programs are especially useful for services exposed to:

• A.Ammonia stress corrosion cracking
• B.Sour water
• C.Caustic embrittlement
• D.Sulfidation

The most effective means of preventing caustic stress corrosion cracking is:

• A.Upgrading to 300 series stainless steel
• B.Postweld heat treatment
• C.Controlling process temperature during steamouts
• D.Reducing caustic concentration