API API-571 Exam
Corrosion and Materials Professional (Page 15 )

Updated On: 9-Feb-2026

If the BHN is 400-500 it may indicate __________.

  1. Carburization
  2. Hydriding
  3. Temper embrittlement
  4. Caustic embrittlement

Answer(s): B



The graphitization rate ____________ with increasing temperature

  1. Increases
  2. Decreases
  3. Stops
  4. Proceeds

Answer(s): A



The level of creep damage is a function of the material and the coincident _________ level at which the creep deformation occurs.

  1. Pressure/Temperature
  2. Pressure/Stress
  3. Temperature/Stress
  4. None of the above

Answer(s): C



Titanium should not be used in known hydriding services such as _____ or ______.

  1. Caustic, amine
  2. Amine, sour water
  3. Sour water, Alkylation
  4. All of the above

Answer(s): B



Convert these temperatures ­ 156º C and 450º F

  1. 304º F, 151º C
  2. 284º F, 218º C
  3. 312º F, 232º C
  4. 296º F, 246º C

Answer(s): C






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