API API-577 Practice Exams
Last updated on Oct 21,2026- Exam Code: API-577
- Exam Name: Welding Inspection and Metallurgy Exam
- Certification Provider: API
- Latest update: Oct 21,2026
Question #11
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)
Question #12
A “mill certificate" is a/an:
- A . Analysis of the chemical elements in an ingot.
- B . Chemical analysis of a base metal to be welded.
- C . List of the chemical and mechanical properties specified by a purchaser.
- D . Product analysis of mechanical properties of a base metal.
Question #13
When welding nickel alloys, it is important that:
- A . The bevel angle be wide enough to allow oscillation of welding torch.
- B . The cooling rate be controlled in order to prevent rapid cooling.
- C . Preheating is always performed to prevent hot cracking.
- D . A wide face and thinner bevel be used.
Question #14
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.
Question #15
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
Question #16
What does an AWS classification number identify?
- A . Electrode diameter and strength
- B . Electrodes and welding rods
- C . Chemical composition of the deposited weld metal
- D . Base metal and group number
Question #17
In general, austenitic stainless steels are considered to have:
- A . Good weldability.
- B . Significant issues with lack of sidewall fusion.
- C . Fewer problems with distortion.
- D . A tendency toward lack of root pass fusion.
Question #18
Which of the following is a practical solution that could prevent or reduce lack of fusion in carbon
steel during the weld process?
- A . Reduce travel speed
- B . Provide proper heat input
- C . Avoid excessive weaving
- D . Use proper joint design
Question #19
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
Question #20
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.