API-571 無料問題集「API Corrosion and Materials Professional」

（A）Water vapor in the hydrocarbon phase

（B）Localized zones of weld HAZ hardness above 200 HB

（C）Absorption and permeation of hydrogen

（D）pH of <7 with dissolved H#S present

（A）Fuel ash corrosion and flue gas dew-point corrosion

（B）Oxidation and sulfidation

（C）Carburization and metal dusting

（D）Carbonate corrosion and CO# corrosion

（A）ADIP

（B）MEA

（C）MDEA

（D）DIPA

（A）Controlled rates of heating and cooling during startup and shutdown can lower stresses

（B）Visual examination is an ineffective method of monitoring thermal fatigue

（C）Because of their ductility, carbon steels have lower resistance to thermal fatigue

（D）Thermal fatigue cracks generally initiate on the interior of a component due to high thermal stress

（A）8% Nickel Alloys

（B）Duplex Stainless Steel

（C）300 Series Stainless Steel

（D）400 Series Stainless Steel

（A）An increase in ductility and notch toughness caused by postweld heat treatment (PWHT) or high- temperature service above 120°F (49°C).

（B）A reduction in fracture toughness caused by long-term exposure in the temperature range of 650°F to
1070°F (345°C to 575°C).

（C）A reduction in ductility and notch toughness caused by postweld heat treatment (PWHT) or low- temperature service below 120°F (49°C).

（D）An increase in toughness caused by long-term exposure in the temperature range of 650°F to 1100°F (345°C to 595°C).

（A）Regions of high velocity and turbulence

（B）Under deposits

（C）Downstream from an injection point

（D）Deadlegs

（A）300 series stainless steels are also susceptible to high-temperature hydrogen attack at conditions normally seen in refinery units.

（B）High-temperature hydrogen attack will most often be associated with the formation of surface blisters.

（C）Acoustic emission testing is not a proven method for the detection of high-temperature hydrogen attack damage.

（D）High-temperature hydrogen attack damage is most often limited to welds and heat-affected zones.

（A）At the toe of the weld in the heat-affected zone of the austenitic material.

（B）In the parent metal on the austenitic side of the weld.

（C）In the center of the dissimilar weld.

（D）At the toe of the weld in the heat-affected zone of the ferritic material.

（A）600°F-1200°F (315°C-650°C)

（B）900°F-1500°F (480°C-815°C)

（C）1500°F-2100°F (815°C-1150°C)

（D）1200°F-1800°F (650°C-980°C)