API API-577 Welding Inspection and Metallurgy Exam Online Training
API API-577 Online Training
The questions for API-577 were last updated at Nov 01,2025.
- Exam Code: API-577
- Exam Name: Welding Inspection and Metallurgy Exam
- Certification Provider: API
- Latest update: Nov 01,2025
Which of the following can result from residual magnetism left in a partially completed weld?
- A . Excessive distortion
- B . Tendency of weld pool to be sluggish
- C . Deflection of the weld arc
- D . Solidification cracking
What is the major cause of lack of fusion in all welding processes involving carbon steel?
- A . Inadequate preheat
- B . Improper welding speed
- C . Improper heat input and improper welding technique
- D . Not using a low hydrogen electrode or improper shielding
What is(are) the most appropriate action(s) to prepare an in-service carbon steel piping system that has been in caustic service for welding?
- A . Neutralize and clean the surface within 6 in. (150 mm) of weld bevels
- B . Steam out the piping system and dry
- C . Verify with pH paper that any surface liquid is “basic"
- D . Grind the surfaces near the bevel to remove contaminants
Which welding process produces a fast-freezing weld pool and is generally suited for joining thin sections or root passes?
- A . GMAW-S
- B . GTAW
- C . GMAW
- D . FCAW
What is the "area of interest" on a weld radiograph?
- A . The entire radiograph minus 2 in. (50.8 mm) from the edges
- B . Only the area of contrasting density
- C . The specific portion of a radiograph that needs to be evaluated
- D . The portion that is less than 3t from the center of the radiograph, where t is the thickness of the weld
Which of the following has the lowest range of welding currents and electrode diameters associated with the GMAW process?
- A . Short circuiting transfer
- B . Pulsed droplet transfer
- C . Globular transfer
- D . Spray transfer
To reduce exposure to moisture of low-hydrogen electrodes after they have been removed from the manufacturer’s packaging, they should be stored:
- A . Under low humidity conditions.
- B . In warm holding ovens.
- C . In sealed plastic containers.
- D . In tightly sealed ovens.
The direction of magnetic flux can be confirmed by the use of a:
- A . Pie gauge.
- B . Magnetic-field-sensitive crayon.
- C . Flux line sensitizer.
- D . Calibration gauge.
Which of the following is a commonly accepted limitation of flux core arc welding (FCAW)?
- A . It is more sensitive to drafts and wind than GMAW.
- B . It has lower deposition rates than SMAW.
- C . Shielding must always be provided by an externally supplied gas.
- D . Large volumes of welding fumes are generated.
What is the minimum liquid level that should be maintained above the area that is to be hot tapped on a storage tank or vessel?
- A . 1 ft. (300 mm)
- B . 2 ft. (600 mm)
- C . 3 ft. (900 mm)
- D . 4 ft. (1200 mm)
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