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Free API-577 Exam Braindumps
Welding Inspection and Metallurgy Questions 21–25 (page: 6)

Updated On: 10-Feb-2026
Page 6 of 23
PDF with 110 Questions

What is the liquid flow rate range that should be maintained in piping to be hot tapped?

  1. 0.05 - 2.7 ft./sec (0.015 - 0.82 m/sec)
  2. 1.3 - 4.0 ft./sec (0.40 - 1.20 m/sec)
  3. 2.3 - 3.3 ft./sec (0.70 - 1.00 m/sec)
  4. 4.1 - 5.5 ft./sec (1.25 - 1.68 m/sec)

Answer(s): B



A root opening of a groove weld is:

  1. The surface of a joint member included in the groove.
  2. A separation at the joint root between the work pieces.
  3. The beveled surface of the joint members.
  4. That portion of the groove face adjacent to the joint root.

Answer(s): B



The carbon equivalent formula indicates:

  1. Whether postweld heat treatment (PWHT) will be needed.
  2. Whether preheat will be needed.
  3. The theoretical carbon content of a steel.
  4. The weldability of a steel, based on carbon content.

Answer(s): D



P-numbers are based on which of the following?

  1. Comparable base metal characteristics
  2. Weldability characteristics of base metal
  3. Electrode characteristics
  4. Chemical composition of the base metal

Answer(s): B



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

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

Answer(s): B



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