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API Corrosion and Materials API-571 Exam
API Corrosion and Materials API-571 Exam is related to Advanced Corrosion & Materials Professional Certifications. This exam validates the knowledge and skills of corrosion engineers, corrosion processes among specialized inspectors, chemical engineers and other professionals across the entire petrochemical industry. Highly Specialized Inspectors, Corrosion Engineers and Chemical Engineers usually hold or pursue this certification and you can expect the same job role after completion of this certification.
NEW QUESTION # 14
A carbon steel bundle from the overhead condenser in the crude unit operates at 300º F and is in hydrochloric acid service. It showed severe pitting type corrosion when pulled for inspection. What type of material would be best suited for this service?
- A. 316 stainless steel
- B. 5Cr-0.5Mo
- C. Titanium
- D. 9Cr-1Mo
Answer: C
NEW QUESTION # 15
Oxygen and iron in the wash water injected into reactor effluent can lead to __________ corrosion and fouling.
- A. Decreased
- B. Substantial
- C. Increased
- D. Minimal
Answer: C
Explanation:
Explanation/Reference:
NEW QUESTION # 16
Sigma phase occurs in Ferritic, martensitic, austenitic and duplex stainless steels when exposed to temperatures in the range of _____.
- A. 537º C - 954º C
- B. 584º C - 840º C
- C. 621º C - 926º C
- D. 676º C - 760º C
Answer: A
NEW QUESTION # 17
At elevated temperatures, dissimilar weld metal cracking is aggravated by the diffusion of carbon out of the weld metal and into the base metal. The temperature at which carbon diffusion becomes a concern is above
________.
- A. 800º F
- B. 700º F
- C. 900º F
- D. 750º F
Answer: A
NEW QUESTION # 18
The primary factors affecting high temperature oxidation are metal temperature and _______.
- A. Pressure
- B. Alloy composition
- C. Oxygen
- D. Stress
Answer: B
NEW QUESTION # 19
General or localized corrosion of carbon steels and other metals caused by dissolved salts, gases, organic compounds or microbiological activities is called ________.
- A. Atmospheric Corrosion
- B. Cooling Water Corrosion
- C. Flue Gas Corrosion
- D. All of the Above
- E. None of the Above
Answer: B
NEW QUESTION # 20
Lean amine is generally not corrosive because they have either low conductivity and/or high pH. Corrosion rates increase with increasing temperatures, particularly in rich amine service. Temperatures above _________ can result in acid gas flashing and severe
localized corrosion.
- A. 240(o) F
- B. 170(o) F
- C. 190(o) F
- D. 220(o) F
Answer: D
NEW QUESTION # 21
A prime location for erosion is:
- A. Any superheated steam piping.
- B. In catalyst piping.
- C. Upstream of a pump.
- D. Downstream of a gate valve.
Answer: B
NEW QUESTION # 22
Cavitation is a form of erosion caused by the formation and instantaneous collapse of innumerable tiny vapor bubbles. Temperatures approaching the boiling point of the liquid are _________ to result in bubble formation.
- A. None of the above
- B. More likely
- C. Not likely
- D. Less likely
Answer: B
NEW QUESTION # 23
For galvanic corrosion to take place, three conditions must be met, presence of an electrolyte, two different materials or alloys and ___________.
- A. A cathode
- B. None of the above
- C. An anode
- D. An electrical connection
Answer: D
NEW QUESTION # 24
__________ is a form of damage found mostly in older vintage carbon steels and C-0.5 Mo low alloy steels under the combined effects of deformation and aging at an intermediate temperature.
- A. Strain aging
- B. None of the above
- C. Thermal fatigue
- D. Spheroidization
Answer: A
NEW QUESTION # 25
A minimum of ________ to ______ molybdenum is needed in an alloy to resist naphthenic acid corrosion.
- A. 2%, 3%
- B. 2%, 2 1/2 %
- C. 1%, 2%
- D. 1 1/2 %, 2 1/2 %
Answer: B
NEW QUESTION # 26
Corrosion from oxygen in boiler feed water usually creates:
- A. Uniform corrosion.
- B. Isolated pitting.
- C. Hard and brittle zones.
- D. Intergranular cracking.
- E. Transgranular cracking.
Answer: B
NEW QUESTION # 27
__________ is a form of cracking that results when certain molten metals come in contact with specific alloys. Cracking can be very sudden and brittle in nature.
- A. AET
- B. LME
- C. SOHIC
- D. SCC
Answer: B
NEW QUESTION # 28
Which of the following materials are susceptible to polythionic acid SCC?
- A. Alloy 800
- B. Alloy 600
- C. 300 Series SS
- D. All of the above
Answer: D
NEW QUESTION # 29
Formation of a metallurgical phase known as sigma phase results in a loss of _________ in some stainless steels as a result of high temperature exposure.
- A. None of the above
- B. Ductility
- C. Embrittlement
- D. Fracture toughness
Answer: D
NEW QUESTION # 30
Amine cracking is ________ likely to occur in lean MEA and DEA services than in MDEA and DIPA services.
- A. Less
- B. None of the above
- C. As
- D. More
Answer: D
NEW QUESTION # 31
Dissimilar weld metal cracking occurs because the coefficients of thermal expansion between ferritic steels and 300 Series stainless steels differ by ________ or more.
- A. 15%
- B. 20%
- C. 10%
- D. 30%
Answer: D
NEW QUESTION # 32
Cooling water corrosion is a concern with water-cooled __________ and cooling towers in all applications across all industries.
- A. Exchangers
- B. Vessels
- C. Piping
- D. Pumps
Answer: A
NEW QUESTION # 33
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