Free API-571 Exam Braindumps
Corrosion and Materials Professional Questions 201–205 (page: 42)

Updated On: 9-Feb-2026

Carbonate cracking typically propagates _________ to the weld; the pattern of cracking observed on the surface is sometimes described as ________.

  1. Transverse, Eyebrow
  2. Parallel, Spider web
  3. Diagonal, Half moon
  4. Perpendicular, Stair step

Answer(s): B



Dissimilar weld metal cracking occurs because the coefficients of thermal expansion between ferritic steels and 300 Series stainless steels differ by ________ or more.

  1. 10%
  2. 15%
  3. 20%
  4. 30%

Answer(s): D



___________ is when oxygen reacts with carbon steel and other alloys at high temperatures converting the metal to oxide scale.

  1. High temperature corrosion
  2. Oxidation
  3. Dealloying
  4. Thermal fatigue

Answer(s): A



With steam blanketing, failure occurs as a result of _________ in the tube from the internal steam pressure at the elevated temperature.

  1. Stress risers
  2. Velocity
  3. Hoop stress
  4. Tensile strength

Answer(s): C



Once cracking from LME has occurred, grinding out the affected area ______ an acceptable fix.

  1. Is
  2. Is not
  3. Can be
  4. Can not be

Answer(s): B



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