API-571

API-571 practice questions, page 7 of 18, with answer review and explanations.

Question 31

Carbonate stress corrosion cracking usually occurs at welds or cold worked areas that __________.

  1. Have been stressed relieved
  2. Have not been stressed relieved
  3. Have high residual stress
  4. Have high-applied stress

Question 32

Nitriding is usually confined to the surface of most components and will have a dull, ______ appearance. In more advanced stages, the material will exhibit very hard surface hardness.

  1. Gray
  2. Black
  3. Brown
  4. White

Question 33

Carbon steel is susceptible to SCC when used in ___________ service.

  1. Hydrogen
  2. Ammonia
  3. High temperature
  4. High pressure

Question 34

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.

  1. Large, More
  2. Small, Less
  3. Large, Less
  4. Small, More

Question 35

Equipment that is temper embrittled may be susceptible to _______ during start-up and shutdown.

  1. Creep
  2. Thermal fatigue
  3. Brittle fracture
  4. Stress fatigue