API API Certifications API-571 Questions & Answers

• Question 331:

  ______ is most likely found in hard welds and heat affected zones and in high strength components.

  A. SOHIC

  B. HIC

  C. Carburization

  D. SSC

  Correct Answer: D

• Question 332:

  Sulfuric acid promotes general and localized corrosion of carbon steel. Carbon steel heat affected zones may experience severe corrosion. Acid concentration, temperature, alloy content and ____________ are critical factors affecting sulfuric acid corrosion.

  A. Pressure

  B. Stress

  C. Velocity

  D. Ductility

  Correct Answer: C

• Question 333:

  Caustic stress corrosion cracking typically propagates _______ to the weld in adjacent base metal but can occur in the weld deposit or heat affected zone.

  A. Transverse

  B. Perpendicular

  C. Parallel

  D. Across

  Correct Answer: C

• Question 334:

  _______ is the primary alloying agent that affects resistance to oxidation.

  A. Chromium

  B. Molybdenum

  C. Silicon

  D. Aluminum

  Correct Answer: A

• Question 335:

  Amine corrosion refers to the general and/or localized corrosion that occurs principally on _________ in amine treating processes. Corrosion is not caused by the amine itself, but results from dissolved acid gases (CO² and H²S), amine degradation products, heat stable amine salts and other contaminants.

  A. Carbon steel

  B. Duplex SS

  C. 300 Series SS

  D. 400 Series SS

  Correct Answer: A

• Question 336:

  Carburization can be confirmed by a substantial increase in hardness and a _______ in ductility.

  A. Loss

  B. Gain

  C. Change

  D. None of the above

  Correct Answer: A

• Question 337:

  The removal of a material's protective scale by impacting materials is called:

  A. Erosion

  B. Erosion-corrosion

  C. Erosion or erosion-corrosion

  D. IPRSC (imparting particle removal of scale corrosion)

  Correct Answer: B

• Question 338:

  When carbon is absorbed into a material at elevated temperatures while in contact with a carbonaceous substance it is called carburization. Temperatures usually have to be above __________ for this to occur.

  A. 1000º F

  B. 1100º F

  C. 1200º F

  D. 1400º F

  Correct Answer: B

• Question 339:

  Key factors affecting thermal fatigue are the magnitude of the temperature and the __________.

  A. Number of cycles

  B. Pressure

  C. Stress

  D. Alloy composition

  Correct Answer: A

• Question 340:

  The rate of creep deformation is a function of the material, load and temperature. The rate of damage is sensitive to both load and temperature. Generally, an increase of about _______ or an increase of ________ on stress can cut the remaining life in half.

  A. 25º F, 15%

  B. 50º F, 10%

  C. 50º F, 15%

  D. 25º F, 10%

  Correct Answer: A