API API Certifications API-571 Questions & Answers

• Question 291:

  Cooling water corrosion can result in many different forms of damage including general corrosion, pitting corrosion, ________, stress corrosion cracking and fouling.

  A. MIC

  B. HIC

  C. SOHIC

  D. All of the above

  Correct Answer: A

• Question 292:

  With sour water corrosion, corrosion increases with __________ NH4HS concentration and __________ velocity.

  A. Increasing, Decreasing

  B. Increasing, Increasing

  C. Decreasing, Decreasing

  D. Decreasing, Increasing

  Correct Answer: B

• Question 293:

  Thermal fatigue damage is in the form of cracking that may occur anywhere in a metallic component where relative movement is constrained, particularly under repeated __________.

  A. Cyclic stresses

  B. Thermal cycling

  C. Pressure variations

  D. All of the above

  Correct Answer: B

• Question 294:

  With chloride stress corrosion cracking, __________ temperatures ________ the susceptibility for cracking.

  A. Decreasing, Increases

  B. Increasing, Increases

  C. Increasing, Decreases

  D. Decreasing, Eliminates

  Correct Answer: B

• Question 295:

  _________ is accelerated high temperature wastage of materials that occurs when contaminants in the fuel form deposits and melt on the metal surfaces.

  A. Spheroidization

  B. Dealloying

  C. Fuel ash corrosion

  D. None of the above

  Correct Answer: C

• Question 296:

  Soil corrosion appears as external thinning with localized losses due to _________.

  A. Resistivity

  B. Pitting

  C. General corrosion

  D. Potential

  Correct Answer: B

• Question 297:

  __________ testing is the best method to determine the susceptibility of a material to hydrogen stress cracking.

  A. Hardness

  B. Acoustic

  C. SWUT

  D. AUT

  Correct Answer: A

• Question 298:

  The creep threshold temperature for 1 ¼, 2 ¼, 5 and 9 Cr is ________.

  A. 600º F

  B. 700º F

  C. 800º F

  D. 1000º F

  Correct Answer: C

• Question 299:

  The best way to prevent 885º F embrittlement is to use low ________ alloys, or to avoid exposing the susceptible material to the embrittling range.

  A. Austenite

  B. Martensite

  C. Ferrite

  D. Chromium

  Correct Answer: C

• Question 300:

  With Cl SCC, ________ levels of chloride ________ the likelihood of cracking.

  A. Decreasing, Increases

  B. Increasing, Decreases

  C. Increasing, Increases

  D. Increasing, Eliminates

  Correct Answer: C