Free Online API API-571 Practice Test

Which material does not have an endurance limit?

Phosphoric acid corrosion is usually found in ________ areas. 

Soil to Air interface areas are usually more susceptible to corrosion than the rest of the structure because of ___________ and __________ availability. 

____________ is a form of environmental cracking that can initiate on the surface of high strength low alloy steels and carbon steels with highly localized zones of high hardness in the weld metal and HAZ as a result of exposure to aqueous HF acid service. 

Hydrogen blisters may form as surface bulges on the ID, the OD on within the wall thickness of a pipe or pressure vessel. Blistering occurs from hydrogen generated by ______, not hydrogen gas from the process stream.