Latest [Apr 27, 2024] API API-571 Exam Practice Test To Gain Brilliante Result
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NEW QUESTION # 125
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. 300º F
- B. 165º F
- C. 210º F
- D. 270º F
Answer: B
NEW QUESTION # 126
Metal dusting is preceded by ________ and is characterized by rapid metal wastage.
- A. Carburization
- B. None of the above
- C. Graphitization
- D. Decarburization
Answer: A
NEW QUESTION # 127
300 Series SS can be used for sour water service at temperatures below ____________, where Chloride SCC is not likely.
- A. 175(o) F
- B. 150(o) F
- C. 140(o) F
- D. 120(o) F
Answer: C
NEW QUESTION # 128
The signature mark of a fatigue failure is a _______ type fingerprint that has concentric rings.
- A. Clam Shell
- B. Radii
- C. Half-Moon
- D. Eyebrow
Answer: A
Explanation:
Explanation
NEW QUESTION # 129
Damage from sigma phase appears in the form of ________.
- A. Ductility
- B. Cracking
- C. Corrosion
- D. Hardness
Answer: B
Explanation:
Explanation/Reference:
NEW QUESTION # 130
_________ significantly increases the probability and severity of blistering, HIC and SOHIC.
- A. Hydrogen
- B. Cyanide
- C. Oxygen
- D. Caustic
Answer: B
NEW QUESTION # 131
__________ are the most common type of equipment susceptible to carburization in the refining industry.
- A. Fin Fans
- B. Reactors
- C. Heat exchangers
- D. Heater tubes
Answer: D
NEW QUESTION # 132
All piping and equipment exposed to HF acid at any concentration with hardness levels above the recommended limit (237 BHN) are subject to _________.
- A. None of the above
- B. Chloride stress cracking
- C. Sulfide stress cracking
- D. Hydrogen stress cracking
Answer: D
NEW QUESTION # 133
A condition where steel loses strength due to the removal of carbon and carbides leaving only an iron matrix is called decarburization. This occurs during high temperatures, during PWHT and from exposure to fires. Which of the following materials is not affected by this?
- A. Duplex SS
- B. Carbon steel
- C. Low alloy steel
- D. None of the above
Answer: A
NEW QUESTION # 134
________ eliminates the susceptibility of most common steels to SCC.
- A. High temperature
- B. Preheat
- C. All of the above
- D. PWHT
Answer: D
NEW QUESTION # 135
Carbonate SCC can occur at relatively low levels of ________ but usually occurs at welds that have not been stressed relieved.
- A. Acid concentration
- B. Residual stress
- C. None of the above
- D. Applied stress
Answer: B
NEW QUESTION # 136
Blistering, HIC and SOHIC have been found to occur between ambient and ________.
- A. 250(o) F
- B. 300(o) F
- C. 400(o) F
- D. 350(o) F
Answer: B
NEW QUESTION # 137
Corrosion from oxygen tends to be __________ type damage and can show up anywhere even if only very small amounts break through the scavenging system.
- A. Pitting
- B. Cracking
- C. General
- D. Localized
Answer: A
NEW QUESTION # 138
_________ is the result of cyclic stress caused by variations in temperature.
- A. Cyclic Cracking
- B. Stress Corrosion Cracking
- C. Creep
- D. Thermal Fatigue
Answer: D
NEW QUESTION # 139
What standard refers to Fitness-For-Service evaluations?
- A. RP 588
- B. RP 568
- C. RP 579
- D. RP 581
Answer: C
NEW QUESTION # 140
Preventative measures to minimize the potential for brittle fracture in existing equipment are limited to controlling _______ and ________, minimizing pressure at ambient temperatures during start-up and shutdown and periodic inspections at high stress locations.
- A. Stress, pressure
- B. Temperature, stress
- C. Velocity, stress
- D. Temperature, Pressure
Answer: D
NEW QUESTION # 141
The most common method used for monitoring underground structures is measuring the structure to soil
______ using dedicated reference electrodes near the structure.
- A. Corrosiveness
- B. Potential
- C. Electrolyte
- D. Resistivity
Answer: B
NEW QUESTION # 142
What structure is 409 stainless steel?
- A. Martensitic
- B. Duplex
- C. Ferritic
- D. Austenitic
Answer: C
NEW QUESTION # 143
With sour water corrosion, at a given pressure, the H(2)S concentration in the sour water _________ as temperatures ________.
- A. Increases, increases
- B. Decreases, increases
- C. Decreases, decreases
- D. Increases, decreases
Answer: B
NEW QUESTION # 144
Weld heat affected zone graphitization is most frequently found in the heataffected zone adjacent to welds in a narrow band, corresponding to the low temperature edge of the heat affected zone, In multi-pass welded butt joints, these zones overlap each other covering the entire cross section. Because of its appearance, this type of graphitization is called________.
- A. Half-moon
- B. Eyebrow
- C. Radii
- D. None of the above
Answer: B
NEW QUESTION # 145
Galvanized steel components should not be welded to ________ due to LME.
- A. 300 Series SS
- B. Carbon steel
- C. Duplex SS
- D. 400 Series SS
Answer: A
NEW QUESTION # 146
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