Online Access Free API-571 Practice Test

Corrosion rates of carbon steel pipe in sulfuric acid service increase significantly:

• A.In stagnant conditions
• B.At acid concentrations below 65%
• C.At acid concentrations above 65%
• D.At acid concentrations above 95%

(Prevention of high-temperature hydrogen attack is usually achieved by using:)

• A.High-nickel alloy steels selected in accordance with API RP 941
• B.Carbon-manganese steels with low carbon content
• C.Alloy steels with chromium and molybdenum added to increase carbide stability
• D.Austenitic stainless steel cladding on carbon steel equipment

Temper embrittlement is a metallurgical change that is:

• A.Not readily apparent but can be confirmed through tension testing
• B.Not readily apparent but can be confirmed through impact testing
• C.Readily apparent and can be confirmed through impact testing
• D.Readily apparent and can be confirmed through metallography

Which of the following is the most significant result of spheroidization in steels?

• A.Loss of strength
• B.Loss of ductility
• C.Increased potential for stress corrosion cracking
• D.Increased hardness

(Refractory materials can suffer what forms of degradation in service?)

• A.Carburization and fuel ash corrosion
• B.Refractory dusting and checking
• C.Sulfidation and oxidation
• D.Nitriding and embrittlement