Free API-571 Exam Braindumps (page: 41)

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Soil corrosion of carbon steel can be minimized through the use of special backfill, coatings and _______.

  1. Cathodic protection
  2. Resistivity
  3. Temperature
  4. None of the above

Answer(s): A



Which of the following materials are generally not suitable for HF service?

  1. 300 Series SS
  2. Carbon steel
  3. 400 Series SS
  4. Both A and C

Answer(s): D



In piping and equipment, creep cracking can occur where high metal temperatures and _________ occur together. Creep cracking, once initiated, can progress rapidly.

  1. Pressures
  2. Stress risers
  3. Velocities
  4. None of the above

Answer(s): B



At elevated temperatures, dissimilar weld metal cracking is aggravated by the diffusion of carbon out of the weld metal and into the base metal. The temperature at which carbon diffusion becomes a concern is above ________.

  1. 700º F
  2. 750º F
  3. 800º F
  4. 900º F

Answer(s): C






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