API ICP Programs API-571 Questions & Answers

• Question 441:

  Which of the following materials are susceptible to polythionic acid SCC?

  A. 300 Series SS

  B. Alloy 600

  C. Alloy 800

  D. All of the above

  Correct Answer: D

• Question 442:

  The grain size has an important influence on the high temperature ductility and on the reheat cracking susceptibility. A ________ grain size results in _______ ductile heat affected zones, making the material more susceptible to reheat cracking.

  A. Large, more

  B. Small. Less

  C. Large, Less

  D. Small, More

  Correct Answer: C

• Question 443:

  Proper application of ________ will control but not eliminate microbes that cause MIC so that continued treatment is necessary.

  A. Ozone

  B. Caustic

  C. Biocides

  D. None of the above

  Correct Answer: C

• Question 444:

  High temperature hydrogen attack results from exposure to hydrogen at elevated temperatures and pressures. The hydrogen reacts with __________ in steel to produce _________, which cannot diffuse through the steel. The loss of carbides causes an overall loss in strength.

  A. Carbides, oxygen

  B. Alloys, hydrogen dioxide

  C. Carbides, methane

  D. Hydrogen dioxide, H²S

  Correct Answer: C

• Question 445:

  Temperature, ________ and stress are critical factors of stress rupture. This is usually found in furnaces with coking tendencies and fired heater tubes.

  A. Pressure

  B. Ductility

  C. Time

  D. Tensile strength

  Correct Answer: C

• Question 446:

  Hydrogen permeation or diffusion rates have been found to be minimal at pH _______ and increase at both higher and lower pH's.

  A. 4

  B. 5

  C. 6

  D. 7

  Correct Answer: D

• Question 447:

  Corrosion of the anode may be significantly higher ________ to the connection to the cathode, depending on solution conductivity.

  A. Parallel

  B. Adjacent

  C. Diagonally

  D. Perpendicular

  Correct Answer: B

• Question 448:

  ________ is a loss in toughness due to a metallurgical change that can occur in alloys containing a ferrite phase, as a result of exposure in the temperature range 600º F to 1000º F.

  A. Caustic embrittlement

  B. Notch toughness

  C. 885º F embrittlement

  D. Ductile embrittlement

  Correct Answer: C

• Question 449:

  Components that have been carburized may have a change in the level of ________.

  A. Carbon

  B. Chromium

  C. Ferromagnetism

  D. Stress

  Correct Answer: C

• Question 450:

  Decarburization results in a __________, which can be confirmed by hardness testing.

  A. Hardness

  B. Softness

  C. Brittleness

  D. Oxidizing

  Correct Answer: B