API API Certifications API-571 Questions & Answers

• Question 91:

  Stainless steels with sigma can normally withstand normal operating stresses but upon cooling to temperatures below _______ may show a complete lack of fracture toughness as measured by a Charpy impact test.

  A. 800º F

  B. 600º F

  C. 500º F

  D. 400º F

  Correct Answer: C

• Question 92:

  Vibration-induced fatigue can be eliminated or reduced through _________ and the use of supports and vibration dampening equipment. Material upgrades are not usually a solution.

  A. Hangers

  B. Dummy legs

  C. Design

  D. None of the above

  Correct Answer: C

• Question 93:

  _________ is the result of cyclic stress caused by variations in temperature.

  A. Creep

  B. Thermal Fatigue

  C. Cyclic Cracking

  D. Stress Corrosion Cracking

  Correct Answer: B

• Question 94:

  Creep and stress rupture is more likely in a _________ grained material than a _______ grained material.

  A. Course, Fine

  B. Fine, Course

  C. Austenetic, Martensitic

  D. None of the above

  Correct Answer: A

• Question 95:

  Cooling water corrosion and __________ are closely related and should be considered together.

  A. Stress

  B. Velocity

  C. Fouling

  D. Erosion

  Correct Answer: C

• Question 96:

  Which if the following materials are not susceptible to hydrogen stress cracking?

  A. Carbon steel

  B. Low alloy steel

  C. Stainless steel

  D. None of the above

  Correct Answer: C

• Question 97:

  __________ is a form of damage found mostly in older vintage carbon steels and C-0.5 Mo low alloy steels under the combined effects of deformation and aging at an intermediate temperature.

  A. Spheroidization

  B. Thermal fatigue

  C. Strain aging

  D. None of the above

  Correct Answer: C

• Question 98:

  Inspecting for high-cycle fatigue can be difficult since:

  A. The cracks are extremely tight.

  B. Predicting the location of cracking is difficult.

  C. Once the crack begins, only a few cycles are needed for the crack to lead to failure.

  D. Often the equipment is vibrating making non-destructive evaluations difficult.

  Correct Answer: C

• Question 99:

  Most brittle failures appear as:

  A. Branched cracking.

  B. Intergranular cracking.

  C. Ductile tears.

  D. Cleveage.

  Correct Answer: D

• Question 100:

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

  A. 1100º F

  B. 1150º F

  C. 1200º F

  D. 1250º F

  Correct Answer: B