[2025年03月]更新のAPI API-577公式認定ガイドPDF
試験API-577 Welding Inspection And Metallurgy
API API-577 認定試験の出題範囲：
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質問 # 37
What is the most capable NDE method for finding a discontinuity such as incomplete fusion in a joint?
- A. RT
- B. MT
- C. ET
- D. UT
正解：D
質問 # 38
P-numbers are based on which of the following?
- A. Electrode characteristics
- B. Comparable base metal characteristics
- C. Chemical composition of the base metal
- D. Weldability characteristics of base metal
正解：D
質問 # 39
At any time during the welding inspection, if defects are identified:
- A. The inspector should examine all welds produced by the same welder.
- B. The inspector should determine whether the weld may be acceptable for the intended service.
- C. The inspector should seek engineering input on whether the defect is actually acceptable.
- D. They should be corrected before welding proceeds further.
正解：D
質問 # 40
Refer to the following diagram:
Item#1 represents:
- A. root face.
- B. groove weld size.
- C. root weld size.
- D. root opening.
正解：D
質問 # 41
ACFM is an NDE technique ideal for inspecting:
- A. Lap joint welds and uphill welding.
- B. Fillet welds, J-welds, and seal welds.
- C. Nozzles, ring-grooves, and grind-out areas.
- D. Butt welds (single and double bevel) and plug welds.
正解：C
質問 # 42
What is the purpose of the IQI?
- A. Ascertaining how much radiation the source has penetrated the material
- B. Determining that the required sensitivity of the radiograph is achieved
- C. Marking the radiographs with a definite identifying characteristic
- D. Establishing the depth that the radiation source penetrates
正解：B
質問 # 43
When verifying that the filler metal selection is appropriate for the base metal being welded, an inspector should consider:
- A. Need for postweld heat treatment (PWHT).
- B. Chemical composition.
- C. Tensile strength to be higher than the base metal.
- D. Acceptability of physical properties.
正解：B
質問 # 44
Which of the following transfer methods associated with GMAW is characterized by a highly directed stream of discrete drops that are accelerated by arc forces, and negligible spatter?
- A. Spray transfer
- B. Globular transfer
- C. Short circuiting transfer
- D. Pulsed droplet transfer
正解：A
質問 # 45
To avoid burn through during in-service welding on thinner wall equipment, it is generally recommended to:
- A. Use larger diameter electrodes.
- B. Minimize weaving the bead.
- C. Maximize weaving the bead.
- D. Use high heat input.
正解：B
質問 # 46
For design purposes, the maximum usefulness of a weldment under test is based upon the:
- A. Hardness.
- B. Ultimate tensile strength.
- C. Yield strength.
- D. Toughness.
正解：B
質問 # 47
A "mill certificate" is a/an:
- A. List of the chemical and mechanical properties specified by a purchaser.
- B. Chemical analysis of a base metal to be welded.
- C. Product analysis of mechanical properties of a base metal.
- D. Analysis of the chemical elements in an ingot.
正解：A
質問 # 48
For GMAW welding, the last number of the electrode identifies the:
- A. Coating characteristics.
- B. Chemical composition.
- C. Operating characteristics.
- D. Strength of the electrode.
正解：C
質問 # 49
For what maximum outside diameter may a radiographic technique be used in which the radiation passes through two walls and the weld in both walls is viewed for acceptance?
- A. 1.5 in. (38.0 mm)
- B. 3 in.(76.2 mm)
- C. 2.5 in. (63.5 mm)
- D. 3.5 in. (90.0 mm)
正解：B
質問 # 50
In alloy steel, a high hardness measurement could indicate:
- A. A correlation to a low tensile strength.
- B. The presence of untempered martensite.
- C. The Brinell test device was struck too hard with the hammer.
- D. The presence of tempered martensite.
正解：B
質問 # 51
What is a discontinuity?
- A. An interruption in the normal physical structure of a material.
- B. An imperfection which is detectable with NDE.
- C. The response or evidence from the application of NDE.
- D. A departure of a quality characteristic from its intended condition.
正解：A
質問 # 52
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 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
正解：C
質問 # 53
What increases when a welder increases the amperage?
- A. Travel speed
- B. Voltage
- C. Heat
- D. Arc length
正解：C
質問 # 54
Which of the following weld flaws is described as a subsurface terrace and step-like crack weakened by dispersed planar-shaped inclusions?
- A. Sulfite stringers
- B. Hydrogen cracking
- C. Lamellar tearing
- D. Hot cracking
正解：C
質問 # 55
Where is the weld HAZ assumed to be for purposes of hardness testing?
- A. Just adjacent to the toe of the weld
- B. 1 inch on either side of the centerline of the weld
- C. 0.25 inch on either side of the fusion zone
- D. 0.25 inch away from the toe of the weld into the base metal
正解：A
質問 # 56
Rules for qualifying welding operators using radiography on a production weld require what minimum weld length to be examined?
- A. 36 in. (900 mm)
- B. 6 in. (150 mm)
- C. 12 in. (300 mm)
- D. 24 in.(600 mm)
正解：C
質問 # 57
Which of the following has the lowest range of welding currents and electrode diameters associated with the GMAW process?
- A. Globular transfer
- B. Short circuiting transfer
- C. Pulsed droplet transfer
- D. Spray transfer
正解：B
質問 # 58
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2025年最新の実際に出るAPI-577問題集には試験のコツがあるPDF試験材料：https://drive.google.com/open?id=1_ItqEWllySZfJYJubIU54esDaXQTnodp