API API-577 Practice Exams
Last updated on Oct 22,2026- Exam Code: API-577
- Exam Name: Welding Inspection and Metallurgy Exam
- Certification Provider: API
- Latest update: Oct 22,2026
Steels usually require both preheat and PWHT if they have a carbon equivalent higher than:
- A . 0.35
- B . 0.45
- C . 0.50
- D . 0.55
How much should each pass of the transducer overlap the previous path during a weld scan?
- A . 5% of the transducer element dimension.
- B . 10% of the transducer element dimension.
- C . 15% of the transducer element dimension.
- D . 20% of the transducer element dimension.
One limitation of a shielded metal arc welding (SMAW) process is that:
- A . Deposition rates are lower than GMAW.
- B . The process cannot be used in areas of limited access.
- C . It has low tolerance for contaminants.
- D . The process is sensitive to wind and draft.
Which of the following is not usually an essential variable on a WPS form?
- A . Welding technique
- B . Groove design
- C . Base metal
- D . Welding position
If an individual changes an essential variable in the WPS, the individual must:
- A . Re-qualify the PQR.
- B . Re-qualify the WPS.
- C . Record the change on the existing WPS.
- D . List the change as a supplement to the WPS.
The size and width of the weld HAZ is dependent upon:
- A . The properties of the base metal.
- B . The thickness of the metal.
- C . The residual hardness of the weld joint.
- D . The heat input during welding.
When verifying that the filler metal selection is appropriate for the base metal being welded, an inspector should consider:
- A . Chemical composition.
- B . Tensile strength to be higher than the base metal.
- C . Acceptability of physical properties.
- D . Need for postweld heat treatment (PWHT).
In hardness testing of carbon steel weldment specimens, there is an approximate relationship between hardness and:
- A . Toughness
- B . Tensile strength
- C . Ductility
- D . Yield strength
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.
Remote examination of welds may use aids such as telescopes, borescopes, fiberscopes, cameras, or other suitable instruments provided they have:
- A . Good perception and the inspection would be approximately equal to a direct visual exam.
- B . Sensitivity to find possible defects that a direct visual exam would produce.
- C . A resolution at least equivalent to that which is attained by direct visual examination.
- D . A greater acuity than the eye and the inspection would be better than a direct visual.