API 571 UPDATED Exam Questions and CORRECT Answers
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Course
API 571
Institution
API 571
API 571 UPDATED Exam Questions and
CORRECT Answers
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.
A. Graphitization
B. Softening
C. Temper Embrittlement
D. Creep - Correct ANSWER- A
2. ...
API 571 UPDATED Exam Questions and CORRECT Answers 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. A. Graphitization B. Softening C. Temper Embrittlement D. Creep - Correct ANSWER - A 2. What structure is 304 stainless steel? A. Martensitic B. Austenitic C. Duplex D. Ferritic - Correct ANSWER - B 3. _________ is the result of cyclic stress caused by variations in temperature. A. Creep B. Thermal Fatigue C. Cyclic Cracking D. Stress Corrosion Cracking - Correct ANSWER - B 4. General or localized corrosion of carbon steels and other metals caused by dissolved salts, gases, organic compounds or microbiological activities is called ________. A. Flue Gas Corrosion B. Atmospheric Corrosion C. Cooling Water Corrosion D. None of the Above E. All of the Above - Correct ANSWER - C 5. What structure is 410 stainless steel? A. Martensitic B. Austenitic C. Duplex D. Ferritic - Correct ANSWER - A 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 _________. A. 885º F Embrittlement B. Temper Embrittlement C. Stress Corrosion Cracking D. Brittle Fracture - Correct ANSWER - D 7. What structure is 409 stainless steel? A. Martensitic B. Austenitic C. Duplex D. Ferritic - Correct ANSWER - D 8. Low alloy steels contain a maximum of _______ chrome. A. 5% B. 6% C. 7.5% D. 9% - Correct ANSWER - D 9. Which of the following can be affected by 885º F Embrittlement? A. 410 SS B. 430 SS C. 308 SS D. Alloy 2205 E. A, B and D - Correct ANSWER - E 10. For 5Cr -0.5Mo, what is the threshold temperature for creep? A. 500º F B. 800º F C. 600º F D. 700º F - Correct ANSWER - B 11. ________ has been a major problem on coke drum shells. A. Thermal fatigue B. Stress cracking C. Erosion D. Temper embrittlement - Correct ANSWER - A 12. Thermal fatigue cracks propagate ________ to the stress and are usually dagger shaped, transgranular and oxide -filled. A. Axial B. Diagonal C. Transverse D. Angular - Correct ANSWER - C 13. Inspection for wet H2S damage generally focuses on _____ and ______. A. Weld seams B. Nozzles C. Trays D. Down comers E. A and B - Correct ANSWER - E 14. ________ is a form of erosion caused by the formation and instantaneous collapse of innumerable tiny vapor bubbles. A. Condensate corrosion B. Cavitation C. Dew -Point corrosion D. Atmospheric corrosion - Correct ANSWER - B 15. With CUI, corrosion rates __________ with increasing metal temperatures up to the point where the water evaporates quickly. A. Decrease B. Increase C. Stay the same D. None of the above - Correct ANSWER - B 16. Which of the following metals is the most anodic? A. Zinc B. Carbon Steel C. Nickel D. Monel - Correct ANSWER - A 17. Cracking of dissimilar weld metals occurs on the _________ side of a weld between an austenitic and a Ferritic material operating at high temperatures. A. Austenitic B. Ferritic C. Anodic D. Cathodic - Correct ANSWER - B
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