Download Corrosion and Materials.API-571.ExamTopics.2025-07-11.91q.vcex

Vendor: API
Exam Code: API-571
Exam Name: Corrosion and Materials
Date: Jul 11, 2025
File Size: 37 KB
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Demo Questions

Question 1
__________ is a change in the microstructure of certain carbon steels and 0.5 Mo steels after long term operation in the 800º F to 1100º F range.
  1. Graphitization
  2. Softening
  3. Temper Embrittlement
  4. Creep
Correct answer: A
Question 2
What structure is 304 stainless steel?
  1. Martensitic
  2. Austenitic
  3. Duplex
  4. Ferritic
Correct answer: B
Question 3
_________ is the result of cyclic stress caused by variations in temperature.
  1. Creep
  2. Thermal Fatigue
  3. Cyclic Cracking
  4. Stress Corrosion Cracking
Correct answer: B
Question 4
General or localized corrosion of carbon steels and other metals caused by dissolved salts, gases, organic compounds or microbiological activities is called ________.
  1. Flue Gas Corrosion
  2. Atmospheric Corrosion
  3. Cooling Water Corrosion
  4. None of the Above
  5. All of the Above
Correct answer: C
Question 5
What structure is 410 stainless steel?
  1. Martensitic
  2. Austenitic
  3. Duplex
  4. Ferritic
Correct answer: A
Question 6
The sudden rapid fracture under stress (residual or applied) where the material exhibits little or no evidence of ductility or plastic deformation is called _________.
  1. 885º F Embrittlement
  2. Temper Embrittlement
  3. Stress Corrosion Cracking
  4. Brittle Fracture
Correct answer: D
Question 7
What structure is 409 stainless steel?
  1. Martensitic
  2. Austenitic
  3. Duplex
  4. Ferritic
Correct answer: D
Question 8
Low alloy steels contain a maximum of _______ chrome.
  1. 5%
  2. 6%
  3. 7.5%
  4. 9%
Correct answer: D
Question 9
Which of the following can be affected by 885º F Embrittlement?
  1. 410 SS
  2. 430 SS
  3. 308 SS
  4. Alloy 2205
  5. A, B and D
Correct answer: E
Question 10
For 5Cr-0.5Mo, what is the threshold temperature for creep?
  1. 500º F
  2. 800º F
  3. 600º F
  4. 700º F
Correct answer: B
Question 11
________ has been a major problem on coke drum shells.
  1. Thermal fatigue
  2. Stress cracking
  3. Erosion
  4. Temper embrittlement
Correct answer: A
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