API API Certifications API-571 Questions & Answers

• Question 301:

  What is the chemical symbol for ethane or ethylene?

  A. C²

  B. C3

  C. C4

  D. CH4

  Correct Answer: A

• Question 302:

  A steam actuated soot blower has condensate in the first steam exiting the soot blower. What type of damage can be expected to be found when the furnace is brought down for maintenance and inspection?

  A. Thermal fatigue

  B. Steam blanketing

  C. Creep

  D. Stress rupture

  Correct Answer: A

• Question 303:

  The loss in strength from spheroidization (Softening) is usually accompanied by a(n) _________ in ductility, which allows for deformation at stress concentrations.

  A. Increase

  B. Decrease

  C. Reduction

  D. Yield

  Correct Answer: A

• Question 304:

  Which of the following materials is affected by high temperature corrosion?

  A. Carbon steel

  B. 300 Series SS

  C. 400 Series SS

  D. All of the above

  Correct Answer: D

• Question 305:

  _________ is a change in the microstructure of certain carbon steels and 0.5Mo steels after long-term operation in the 800º F to 1100º F range that may cause a loss in strength, ductility and/or creep resistance.

  A. Embrittlement

  B. Carburization

  C. Graphitization

  D. Sensitization

  Correct Answer: C

• Question 306:

  The major factors affecting high temperature sulfidation are the temperature, the presence of hydrogen, the H²S concentration and the ________.

  A. Pressure

  B. Stress

  C. Alloy composition

  D. Velocity

  Correct Answer: C

• Question 307:

  Cracks that are typically straight, non-branching, and devoid of any associated plastic deformation are likely associated with which type of failure?

  A. Stress corrosion cracking

  B. Brittle fracture

  C. Thermal fatigue

  D. Temper embrittlement

  Correct Answer: B

• Question 308:

  ________ has been a major problem on coke drum shells.

  A. Thermal fatigue

  B. Stress cracking

  C. Erosion

  D. Temper embrittlement

  Correct Answer: A

• Question 309:

  A hard, brittle surface layer will develop on some alloys due to exposure to high temperature process streams containing high levels of nitrogen compounds such as ammonia or cyanides, particularly under reducing conditions, is called _______.

  A. Carburization

  B. Spheroidization

  C. Nitriding

  D. None of the above

  Correct Answer: C

• Question 310:

  Nitriding is usually confined to the surface of most components and will have a dull, ______ appearance. In more advanced stages, the material will exhibit very hard surface hardness.

  A. Gray

  B. Black

  C. Brown

  D. White

  Correct Answer: A