API-571

API-571 practice questions, page 17 of 18, with answer review and explanations.

Question 81

Caustic embrittlement cracking can be effectively prevented by means of PWHT at a temperature of _______.

  1. 1100º F
  2. 1150º F
  3. 1200º F
  4. 1250º F

Question 82

General or localized corrosion of carbon steels and other metals caused by dissolved salts, gases, organic compounds or microbiological activity is called _______.

  1. Cooling water corrosion
  2. Oxidation
  3. MIC
  4. None of the above

Question 83

With CO² corrosion, increasing temperatures _________ corrosion rates up to the point where CO² is vaporized.

  1. Decrease
  2. Increase
  3. Eliminate
  4. None of the above

Question 84

Units where graphitization may be suspected are the FCCU and the _____ unit.

  1. Hydrotreater
  2. Coker
  3. Alky
  4. None of the above

Question 85

Where is PASCC normally located?

  1. Adjacent to welds
  2. On impellers
  3. At stress risers
  4. At flanges