100% Real API-577 dumps - Brilliant API-577 Exam Questions PDF
API-577 Exam PDF [2025] Tests Free Updated Today with Correct 112 Questions
NEW QUESTION # 45
In general, austenitic stainless steels are considered to have:
- A. A tendency toward lack of root pass fusion.
- B. Significant issues with lack of sidewall fusion.
- C. Fewer problems with distortion.
- D. Good weldability.
Answer: D
NEW QUESTION # 46
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. Spray transfer
- D. Globular transfer
Answer: A
NEW QUESTION # 47
Which of the following is a hazard associated with in-service welding on a carbon steel pipe containing chlorine?
- A. Explosion or unstable reaction with the addition of localized heat.
- B. Exothermic decomposition or explosion.
- C. Hydrogen released during welding process can initiate hydrogen-assisted cracking.
- D. Carbon steel will burn in the presence of chlorine and high heat.
Answer: A
NEW QUESTION # 48
Hot tapping and in-service welding should be carried out only with:
- A. Steels that have a carbon equivalent below 0.30.
- B. Low-hydrogen consumables and electrodes.
- C. Low-hydrogen root pass and cellulosic weld out.
- D. Cellulosic-type electrodes to reduce penetration.
Answer: B
NEW QUESTION # 49
What is the "area of interest" on a weld radiograph?
- A. Only the area of contrasting density
- B. The entire radiograph minus 2 in. (50.8 mm) from the edges
- C. The portion that is less than 3t from the center of the radiograph, where t is the thickness of the weld
- D. The specific portion of a radiograph that needs to be evaluated
Answer: D
NEW QUESTION # 50
When welding nickel alloys, it is important that:
- A. Preheating is always performed to prevent hot cracking.
- B. The bevel angle be wide enough to allow oscillation of welding torch.
- C. The cooling rate be controlled in order to prevent rapid cooling.
- D. A wide face and thinner bevel be used.
Answer: C
NEW QUESTION # 51
For hot tap and in-service welding, above what carbon equivalent limit is it recommended to use extra low hydrogen electrodes to weld carbon steels?
- A. 0.48%
- B. 0.35%
- C. 0.30%
- D. 0.42%
Answer: D
NEW QUESTION # 52
Which welding process has been associated most with lack of fusion with shop-fabricated piping?
- A. FCAW
- B. FCAW-SW
- C. GMAW-S
- D. GMAW-SF
Answer: C
NEW QUESTION # 53
A crack with its major axis oriented approximately perpendicular to the weld axis is called a:
- A. Non-directional crack.
- B. Perpendicular crack.
- C. Transverse crack.
- D. Lamellar crack.
Answer: C
NEW QUESTION # 54
A "mill certificate" is a/an:
- A. Product analysis of mechanical properties of a base metal.
- B. Analysis of the chemical elements in an ingot.
- C. Chemical analysis of a base metal to be welded.
- D. List of the chemical and mechanical properties specified by a purchaser.
Answer: D
NEW QUESTION # 55
Which of the following is a practical solution that could prevent or reduce lack of fusion in carbon steel during the weld process?
- A. Avoid excessive weaving
- B. Reduce travel speed
- C. Provide proper heat input
- D. Use proper joint design
Answer: C
NEW QUESTION # 56
P-numbers are based on which of the following?
- A. Weldability characteristics of base metal
- B. Chemical composition of the base metal
- C. Comparable base metal characteristics
- D. Electrode characteristics
Answer: A
NEW QUESTION # 57
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. Grind the surfaces near the bevel to remove contaminants
- B. Steam out the piping system and dry
- C. Verify with pH paper that any surface liquid is "basic"
- D. Neutralize and clean the surface within 6 in. (150 mm) of weld bevels
Answer: D
NEW QUESTION # 58
Crater cracks typically occur:
- A. In weld metal at the point where the arc terminates.
- B. In weld metal at the point where the arc initiates.
- C. In the HAZ at the point where the arc initiates.
- D. In the HAZ at the point where the arc terminates.
Answer: A
NEW QUESTION # 59
The size and width of the weld HAZ is dependent upon:
- A. The properties of the base metal.
- B. The heat input during welding.
- C. The residual hardness of the weld joint.
- D. The thickness of the metal.
Answer: B
NEW QUESTION # 60
What GMAW welding process uses carbon dioxide as the shielding gas, and is limited to the flat and horizontal position?
- A. Pulsed transfer
- B. Spray transfer
- C. Globular transfer
- D. Short circuiting transfer
Answer: C
NEW QUESTION # 61
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