API 653 practice test

API 653 · Question 1 of 2557:21

V. Practical knowledge - specific (API 653 and 650, RP 571 listed mechanisms, RP 575, RP 576, RP 577, RP 651, RP 652)

A product tank with a water bottom has localized pits under sludge on the floor, with tubercle-like deposits and a sour smell. Which mechanism is most likely at work?

Press A-D or 1-4 to choose an answer while this question is on screen.

Caustic stress corrosion cracking at shell weldsAtmospheric corrosionMicrobiologically influenced corrosionEthanol stress corrosion cracking at shell welds

Patch is off during timed tests. On the free 10-question check and in untimed course practice, Patch walks you through your answers.

Every question is original and written to American Petroleum Institute's published content outline, and every explanation cites the code section or source it relies on.