API API-577 Welding Inspection and Metallurgy Exam Online Training
API API-577 Online Training
The questions for API-577 were last updated at Jun 14,2025.
- Exam Code: API-577
- Exam Name: Welding Inspection and Metallurgy Exam
- Certification Provider: API
- Latest update: Jun 14,2025
What is the liquid flow rate range that should be maintained in piping to be hot tapped?
- A . 0.05 – 2.7 ft./sec (0.015 – 0.82 m/sec)
- B . 1.3 – 4.0 ft./sec (0.40 – 1.20 m/sec)
- C . 2.3 – 3.3 ft./sec (0.70 – 1.00 m/sec)
- D . 4.1 – 5.5 ft./sec (1.25 – 1.68 m/sec)
A root opening of a groove weld is:
- A . The surface of a joint member included in the groove.
- B . A separation at the joint root between the work pieces.
- C . The beveled surface of the joint members.
- D . That portion of the groove face adjacent to the joint root.
The carbon equivalent formula indicates:
- A . Whether postweld heat treatment (PWHT) will be needed.
- B . Whether preheat will be needed.
- C . The theoretical carbon content of a steel.
- D . The weldability of a steel, based on carbon content.
P-numbers are based on which of the following?
- A . Comparable base metal characteristics
- B . Weldability characteristics of base metal
- C . Electrode characteristics
- D . Chemical composition of the base metal
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.
Which of the following is a practical solution to eliminate or reduce porosity when welding carbon steel?
- A . Reduce travel speed
- B . Proper shielding
- C . Lower heat input
- D . Arc length control
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 . ONCE
- B . TWICE
- C . THREE TIMES
- D . FOUR TIMES
According to the PQR 8025, does the thickness range qualified concur with the thickness range as stated on the WPS 802?
- A . Yes, but only for thicknesses greater than .280"
- B . No, the material thickness on the PQR should be .375"
- C . Yes, the PQR qualifies the ranges as stated on the WPS
- D . No, the PQR thickness should have been .560"
A crack with its major axis oriented approximately perpendicular to the weld axis is called a:
- A . Lamellar crack.
- B . Non-directional crack.
- C . Transverse crack.
- D . Perpendicular crack.
What is the purpose of a PQR?
- A . To provide direction to the welder making production welds.
- B . To establish the properties of the weldment.
- C . To document that a welder has correctly followed a WPS.
- D . To establish a welder’s capability to make a quality weld.
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