[May-2024] Get 100% Real Free ICP Programs API-571 Sample Questions
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NEW QUESTION # 125
Ammonium chloride corrosion is the general or localized corrosion, often pitting, normally occurring under ammonium chloride or amine salt deposits. All commonly used materials are susceptible to ammonium chloride corrosion. A small amount of _________ can lead to very aggressive corrosion.
- A. Salt
- B. Ammonium chloride
- C. Water
- D. Amine
Answer: C
NEW QUESTION # 126
Heat treatment can have a significant effect on the toughness and hence fatigue resistance of a metal. In general, ________ grained microstructures tend to perform better than _________ grained.
- A. Martensitic, austenitic
- B. Course, Fine
- C. Austenitic, martensitic
- D. Fine, Course
Answer: D
NEW QUESTION # 127
Changing to a more corrosion resistant and/or higher hardness material _________ improve cavitation resistance.
- A. Will
- B. May not
- C. Will not
- D. May
Answer: B
NEW QUESTION # 128
A 6", A106 Gr B, flanged line carrying caustic wash water at 200ยบ F has signs of atmospheric corrosion.
Which of the following may have help accelerate the corrosion?
- A. Fly ash
- B. Sulfides
- C. None of the above
- D. Caustic
Answer: A
NEW QUESTION # 129
Welds joining dissimilar materials (ferritic and austenetic) may suffer __________ related damage at high temperatures due to differential thermal expansion stresses.
- A. Creep
- B. Stress
- C. Thermal stress
- D. Fatigue
Answer: A
NEW QUESTION # 130
Cracks connecting hydrogen blisters are referred to as ________.
- A. None of the above
- B. SCC
- C. HIC
- D. SOHIC
Answer: C
NEW QUESTION # 131
Carbon steel and low alloy steels are subject to excessive hydrochloric acid corrosion when exposed to any concentration of HCl acid that produces a pH below______.
- A. 5.5
- B. 5.0
- C. 4.5
- D. 6.0
Answer: C
NEW QUESTION # 132
Amine stress corrosion cracking is a term applied to the cracking of steels under the combined actions of
________ and __________ in aqueous alkanolamine systems used to remove/absorb H2S and/or CO2 and their mixtures from various gas and liquid hydrocarbon streams.
- A. Tensile stress, corrosion
- B. Temperature, corrosion
- C. Pressure, stress
- D. Temperature, pressure
Answer: A
NEW QUESTION # 133
Improved resistance to erosion is usually achieved through increasing substrate ________ using harder alloys, hard facing or face-hardening treatment.
- A. Hardness
- B. Composition
- C. Stress
- D. None of the above
Answer: A
NEW QUESTION # 134
Cadmium and lead will cause LME on _____________.
- A. 300 Series SS
- B. Copper alloys
- C. Aluminum alloys
- D. High strength steel
Answer: D
NEW QUESTION # 135
Proper application of ________ will control but not eliminate microbes that cause MIC so that continued treatment is necessary.
- A. Biocides
- B. Ozone
- C. None of the above
- D. Caustic
Answer: A
NEW QUESTION # 136
Carburization can be confirmed by a substantial increase in hardness and a _______ in ductility.
- A. Gain
- B. Change
- C. None of the above
- D. Loss
Answer: D
NEW QUESTION # 137
Corrosion in boiler feedwater and condensate return systems is usually the result of dissolved gases, oxygen and _______.
- A. Carbon Dioxide
- B. H(2)O
- C. Temperature
- D. Carbon monoxide
Answer: A
NEW QUESTION # 138
Steel hardness, __________ and stress are critical factors in causing hydrogen stress cracking.
- A. Strength
- B. Temperature
- C. None of the above
- D. Alloy composition
Answer: A
NEW QUESTION # 139
NAC may be found in hot hydrocarbon streams downstream of the crude and vacuum units, __________ any hydrogen mix point.
- A. Around
- B. Downstream of
- C. Adjacent to
- D. Upstream of
Answer: D
NEW QUESTION # 140
Erosion-corrosion is a description for the damage that occurs when corrosion contributes to erosion by removing protective films or scales, or by exposing the metal surface to further ________ under the combined action of corrosion-erosion.
- A. Stress
- B. Corrosion
- C. None of the above
- D. Oxidation
Answer: B
NEW QUESTION # 141
The removal of a material's protective scale by impacting materials is called:
- A. Erosion or erosion-corrosion
- B. Erosion-corrosion
- C. Erosion
- D. IPRSC (imparting particle removal of scale corrosion)
Answer: B
NEW QUESTION # 142
Temper embrittlement _________ be prevented if the material contains critical levels of the embrittling impurity elements and is exposed in the embrittling range.
- A. Will
- B. Cannot
- C. Can
- D. None of the above
Answer: B
NEW QUESTION # 143
Soil to Air interface areas are usually more susceptible to corrosion than the rest of the structure because of
___________ and __________ availability.
- A. Bacteria
- B. Moisture
- C. A and C
- D. B and C
- E. Oxygen
Answer: C
NEW QUESTION # 144
_______ is the primary alloying agent that affects resistance to oxidation.
- A. Chromium
- B. Aluminum
- C. Molybdenum
- D. Silicon
Answer: A
NEW QUESTION # 145
Caustic is sometimes added to process streams for ________ or as a reactant.
- A. Corrosion control
- B. Inhibiting
- C. Stability
- D. Neutralization
Answer: D
NEW QUESTION # 146
The severity of hydrochloric acid corrosion ________ with _________ HCl concentration and increasing temperatures.
- A. Decreases, increasing
- B. Increases, decreasing
- C. Decreases, decreasing
- D. Increases, increasing
Answer: D
NEW QUESTION # 147
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API-571 Exam topics
Candidates must know the exam topics before they start of preparation. Because it will really help them in hitting the core. Our API-571 exam dumps will include the following topics:
- Explore refining industry damage mechanisms for environment assisted cracking and be able to identify the other types of mechanisms.
- Explore damage mechanisms on high temperature corrosion including oxidation, sulfidation, carburization and metal dusting.
- Understand refining industry damage mechanisms used in uniform of localized loss in thickness phenomena.
- Knowledge of general damage mechanisms applicable to the industry and be able to identify their features and functions.
- Possess a general background on the scope, organization and use of API 571 and be able to review the standards and other references related to it.
- Identify the various mechanical and metallurgical failure mechanisms such as brittle fracture, steam blanketing, stress rupture, cracking, thermal shock, fatigue and corrosion.
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