Free API API-577 Exam Dumps Questions & Answers

If a nonessential variable is changed on a WPS, which of the following actions must occur?

• A.  The welding inspector can simply make the change on the WPS and initial as proof of acceptance.
• B.  It may be changed on the WPS without requalifying the welding procedure.
• C.  The welding procedure will need to be requalified by performing mechanical testing.
• D.  Impact testing must be performed at the discretion of the welding engineer.

A limitation of a stud arc welding (SW) process is:

• A.  Process is limited to a flat position.
• B.  Welding rates are significantly lower than those obtained with SMAW.
• C.  Process is primarily suitable for only carbon steel and low alloy steels.
• D.  Weld is not visible during the welding process.

When welding using the GTAW process, which of the following best describes the appearance of a transverse crack on a radiograph?

• A.  Elongated lines of darker density, irregular in width, and slightly winding in the lengthwise direction.
• B.  A feathery line of longitudinal orientation located at the center of the weld image.
• C.  A feathery, twisted line of darker density running across the width of the weld.
• D.  An irregular darker line near the center of the width of the weld image along the edge of the root pass image.

Where is the weld HAZ assumed to be for purposes of hardness testing?

• A.  1 inch on either side of the centerline of the weld
• B.  0.25 inch on either side of the fusion zone
• C.  0.25 inch away from the toe of the weld into the base metal
• D.  Just adjacent to the toe of the weld

A welding engineer or inspector should be notified when a weld has failed a weld quality test more than how many times in order to help determine the cause of the test failure?

• A.  FOUR TIMES
• B.  THREE TIMES
• C.  ONCE
• D.  TWICE