API-571 무료 덤프문제 온라인 액세스

(Which of the following damage mechanisms affects most common materials of construction?)

• A.Microbiologically induced corrosion
• B.Amine corrosion
• C.Sour water corrosion
• D.Polythionic acid corrosion

Which of the following statements is most accurate with regard to thermal fatigue?

• A.Thermal fatigue cracks generally initiate on the interior of a component due to high thermal stress
• B.Controlled rates of heating and cooling during startup and shutdown can lower stresses
• C.Visual examination is an ineffective method of monitoring thermal fatigue
• D.Because of their ductility, carbon steels have lower resistance to thermal fatigue

Decarburization damage is normally verified by:

• A.Metallographic testing
• B.Bend testing
• C.Tensile testing
• D.Impact testing

The presence of which additional substance(s) will accelerate the corrosion of steel in the presence of sulfur compounds at high temperature?

• A.Oxygen
• B.Chlorides
• C.Hydrogen
• D.Sulfates

(Which of the following may be more susceptible to polythionic acid stress corrosion cracking?)

• A.Monel 400
• B.Type 321 stainless steel
• C.Type 304 stainless steel
• D.SA-516 Grade 70 carbon steel