API-571 Online Practice Questions and Answers

In pressure containing equipment, SOHIC and SCC damage is most often associated with __________.

A. Internals

B. Weldments

C. Branches

D. None of the above

Caustic is sometimes added to process streams for ________ or as a reactant.

A. Stability

B. Corrosion control

C. Neutralization

D. Inhibiting

Temper embrittlement _________ be prevented if the material contains critical levels of the embrittling impurity elements and is exposed in the embrittling range.

A. Can

B. Cannot

C. Will

D. None of the above

Which of the methods are effective for finding thermal fatigue cracks?

A. MT

B. PT

C. VT

D. All of the above

Which of the following is not a critical factor that contributes to a brittle fracture?

A. The material's fracture toughness

B. Maximum operating temperature

C. Stress concentration at a flaw

D. Magnitude of the residual stresses

Corrosion due to acidic sour water containing H²S at a pH between 4.5 and 7.0 is called sour water corrosion. Carbon dioxide (CO²) may also be present. Which of the following materials is susceptible to sour water corrosion?

A. Carbon steel

B. 300 Series SS

C. 400 Series SS

D. Both B and C

Steel hardness, __________ and stress are critical factors in causing hydrogen stress cracking.

A. Temperature

B. Alloy composition

C. Strength

D. None of the above

Dissimilar weld metal cracking can be aggravated by _______.

A. Stress

B. Pressure

C. Thermal cycling

D. Cyclic stresses

Nitriding layers are magnetic. Therefore, _________ should be checked for magnetism as an initial screening for nitriding.

A. 300 Series SS

B. 400 Series SS

C. Duplex SS

D. Low alloy steel

The level of creep damage is a function of the material and the coincident _________ level at which the creep deformation occurs.

A. Pressure/Temperature

B. Pressure/Stress

C. Temperature/Stress

D. None of the above