Free API API-571 Exam Dumps Questions & Answers

Which of the following will be most effective in finding sour water corrosion?

• A.  Spot ultrasonic testing
• B.  Angle beam ultrasonic testing
• C.  Profile radiographic testing
• D.  Guided wave ultrasonic testing

The likelihood of brittle fracture is best lessened by:

• A.  Using thicker construction materials to lower the resulting stress
• B.  Frequent inspection of the piping or equipment involved
• C.  Using carbon or low-alloy steels
• D.  Postweld heat treatment (PWHT)

(Deaerators that have not been postweld heat-treated are commonly subject to:)

• A.  Corrosion fatigue
• B.  Caustic stress corrosion cracking
• C.  Vibration-induced fatigue
• D.  Steam blanketing

The primary cause of ammonium chloride corrosion is the formation of salts:

• A.  During water washing operations in streams containing traces of chlorides
• B.  That may deposit when water evaporates to dry-out conditions as streams are heated
• C.  When steam is injected into streams containing traces of chlorides
• D.  That may precipitate from high-temperature streams as they are cooled

Microbiologically induced corrosion is largely independent of the:

• A.  Presence of hydrogen sulfide
• B.  Water content of the process
• C.  Velocity of the flow stream
• D.  pH of the fluid