最新（2024)API API-571試験問題集
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質問 # 10
Thermal fatigue becomes of concern if the temperature swings exceed:
- A. 50 oF.
- B. 400 oF.
- C. 200 oF.
- D. 100 oF.
正解：C
質問 # 11
_________ is a mechanical form of degradation that occurs when a component is exposed to cyclical stresses for an extended period, often resulting in sudden, unexpected failure.
- A. Cyclic fatigue
- B. Thermal fatigue
- C. Stress fatigue
- D. Mechanical fatigue
正解：D
質問 # 12
Refractory anchor material must be compatible with the _________ of the base metal
- A. Thermal coefficient
- B. Composition
- C. Ductility
- D. Welding
正解：A
質問 # 13
The best method to inspect for SCC is ____.
- A. WFMT
- B. All of the above
- C. AET
- D. UT Shear wave
正解：A
質問 # 14
Changing to a more corrosion resistant and/or higher hardness material _________ improve cavitation resistance.
- A. May not
- B. Will
- C. May
- D. Will not
正解：A
質問 # 15
Geometry, stress level, number of cycles and _________ are the predominate factors in determining the fatigue resistance of a component.
- A. Pressure
- B. Temperature
- C. Material properties
- D. Velocity
正解：C
質問 # 16
Key factors affecting thermal fatigue are the magnitude of the temperature and the __________.
- A. Pressure
- B. Number of cycles
- C. Alloy composition
- D. Stress
正解：B
質問 # 17
Dew point corrosion can occur if the metal temperature is below the dew point. The dew point of sulfuric acid is __________.
- A. 310º F
- B. 220º F
- C. 280º F
- D. 190º F
正解：C
質問 # 18
_________ acid is most often used as a catalyst in polymerization units.
- A. Sulfuric
- B. Phosphoric
- C. Polythionic
- D. Naphthenic
正解：B
質問 # 19
Titanium Hydriding damage occurs primarily in sour water strippers and amine units in the overhead condensers, heat exchanger tubes and other titanium equipment operating above _________.
- A. 210º F
- B. 270º F
- C. 165º F
- D. 300º F
正解：C
質問 # 20
Ammonium chloride salts are hydroscopic and readily absorb water. A ________ amount of water can lead to very aggressive ammonium chloride corrosion.
- A. Improper
- B. Small
- C. Large
- D. Proper
正解：B
質問 # 21
Annealed steels are more resistant to Spheroidization than normalized steels. _________ grained steels are more resistant than ______ grained steels.
- A. Course, Fine
- B. Non-PWHT, PWHT
- C. PWHT, Non-PWHT
- D. Fine, Course
正解：A
質問 # 22
A fatigue fracture is brittle and the cracks are most often __________.
- A. Transgranular
- B. Intergranular
- C. Parallel
- D. Transverse
正解：A
質問 # 23
Mechanical fatigue is caused by:
- A. Cyclic operating conditions of bird poop then rain, bird poop then rain, etc.
- B. Higher than average stresses at high temperatures.
- C. Constant stresses occurring at low temperatures.
- D. Cyclic stresses occurring over a long period of time.
正解：D
質問 # 24
Which of the following alkanolamine systems is the most aggressive in causing amine corrosion?
- A. Monoethanolamine (MEA)
- B. Methyldiethanolamine (MDEA)
- C. Diglycolamine (DGA)
- D. Diethanolamine (DEA)
正解：A
質問 # 25
__________ caustic concentrations and ________ temperatures increase the likelihood and severity of cracking with caustic embrittlement.
- A. Decreasing, Increasing
- B. Increasing, Decreasing
- C. Decreasing, Decreasing
- D. Increasing, Increasing
正解：D
質問 # 26
Thermal fatigue is caused by:
- A. Hours of physical activity during a hot summer day.
- B. Cyclic stresses that come from temperature variations.
- C. Long term operation at elevated temperatures.
- D. Excessive thermal growth.
正解：B
質問 # 27
_________ material sections also have a ___________ resistance to brittle fracture due to higher constraint, which increases triaxial stresses at the crack tip.
- A. Thinner, Higher
- B. Thinner, Lower
- C. Thicker, Lower
- D. Thicker, Higher
正解：C
質問 # 28
Susceptibility of an alloy to sulfidation is determined by its ability to form protective _________.
- A. Sulfide scales
- B. Oxide scales
- C. None of the above
- D. Carbide scales
正解：A
質問 # 29
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API API-571 認定試験の出題範囲：
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