[2025年04月] 検証済みAPI API-577リアル豪華お試しセット試験問題集でPDF
API-577問題集PDF最新 [2025年最新] 究極の学習ガイド
API API-577 認定試験の出題範囲：
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質問 # 50
As a result of welding, metals with a high coefficient of thermal expansion are:
- A. More susceptible to distortion during welding.
- B. Less susceptible to brittle fracture.
- C. Less susceptible to cracking during welding.
- D. More susceptible to brittle fracture.
正解：A
質問 # 51
When performing a carbon steel to carbon steel hot tap where the CE of one of the metals is greater than
0.42%, which of the following electrodes should be used?
- A. E7048-H4
- B. E7018
- C. E7048
- D. E7018-A1
正解：B
質問 # 52
API Recommended Practice 2201 primarily covers the:
- A. WPS/PQR aspects of in-service welding.
- B. Safety aspects of in-service welding.
- C. Technical aspects of hot tapping.
- D. Weldability aspects of in-service welding.
正解：B
質問 # 53
When welding using the GTAW process, which of the following best describes the appearance of a transverse crack on a radiograph?
- A. A feathery line of longitudinal orientation located at the center of the weld image.
- B. A feathery, twisted line of darker density running across the width of the weld.
- C. An irregular darker line near the center of the width of the weld image along the edge of the root pass image.
- D. Elongated lines of darker density, irregular in width, and slightly winding in the lengthwise direction.
正解：B
質問 # 54
Hot tapping and in-service welding should be carried out only with:
- A. Low-hydrogen root pass and cellulosic weld out.
- B. Low-hydrogen consumables and electrodes.
- C. Steels that have a carbon equivalent below 0.30.
- D. Cellulosic-type electrodes to reduce penetration.
正解：B
質問 # 55
API Recommended Practice 577 provides:
- A. A definition of specific techniques and practices that should be used for welding inspection.
- B. Guidance on welding inspection during the fabrication and repairing of refinery equipment and piping.
- C. A definition of welds that should be inspected in refinery and chemical plant equipment.
- D. Guidance on the extent and scope of inspection required for specific types of welds.
正解：B
質問 # 56
What is the liquid flow rate range that should be maintained in piping to be hot tapped?
- A. 2.3 - 3.3 ft./sec (0.70 - 1.00 m/sec)
- B. 4.1 - 5.5 ft./sec (1.25 - 1.68 m/sec)
- C. 0.05 - 2.7 ft./sec (0.015 - 0.82 m/sec)
- D. 1.3 - 4.0 ft./sec (0.40 - 1.20 m/sec)
正解：D
質問 # 57
Crater cracks typically occur:
- A. In weld metal at the point where the arc initiates.
- B. In the HAZ at the point where the arc initiates.
- C. In weld metal at the point where the arc terminates.
- D. In the HAZ at the point where the arc terminates.
正解：C
質問 # 58
A crack with its major axis oriented approximately perpendicular to the weld axis is called a:
- A. Transverse crack.
- B. Non-directional crack.
- C. Perpendicular crack.
- D. Lamellar crack.
正解：A
質問 # 59
When welding nickel alloys, it is important that:
- A. Preheating is always performed to prevent hot cracking.
- B. A wide face and thinner bevel be used.
- C. The cooling rate be controlled in order to prevent rapid cooling.
- D. The bevel angle be wide enough to allow oscillation of welding torch.
正解：C
質問 # 60
What is the most appropriate action when an inspector finds improperly marked filler materials?
- A. Reject them.
- B. Re-qualify the WPS.
- C. Accept them if nonessential variable.
- D. Accept them if the markings are corrected.
正解：A
質問 # 61
How much should each pass of the transducer overlap the previous path during a weld scan?
- A. 10% of the transducer element dimension.
- B. 20% of the transducer element dimension.
- C. 5% of the transducer element dimension.
- D. 15% of the transducer element dimension.
正解：A
質問 # 62
For carbon steels, the HAZ includes those regions heated to a temperature greater than:
- A. 1350°F (730°C)
- B. 1050°F (556°C)
- C. 1150°F (621°C)
- D. 1250°F (677°C)
正解：C
質問 # 63
Filler metals are grouped according to their A-numbers to:
- A. Designate similar chemical compositions.
- B. Minimize the number of welding procedure qualifications.
- C. Define the welding characteristics.
- D. Minimize the number of performance qualifications.
正解：A
質問 # 64
Items to be included in the WPS for GMAW process are:
- A. Type of welding process and test coupon thickness.
- B. Electrode-flux class and electrical characteristics.
- C. Base metal P-number and deposited metal thickness.
- D. Joint design and test coupon thickness.
正解：A
質問 # 65
Where is the weld HAZ assumed to be for purposes of hardness testing?
- A. 0.25 inch away from the toe of the weld into the base metal
- B. Just adjacent to the toe of the weld
- C. 0.25 inch on either side of the fusion zone
- D. 1 inch on either side of the centerline of the weld
正解：B
質問 # 66
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. 3 ft. (900 mm)
- B. 2 ft. (600 mm)
- C. 1 ft. (300 mm)
- D. 4 ft. (1200 mm)
正解：B
質問 # 67
A-number groupings are based upon the:
- A. Chemical composition of the deposited weld metal.
- B. Weldability characteristics of the metal.
- C. Comparable base metal ultimate strength values.
- D. Type and strength of base metal.
正解：A
質問 # 68
What increases when a welder increases the amperage?
- A. Arc length
- B. Voltage
- C. Heat
- D. Travel speed
正解：C
質問 # 69
A four-digit designation for a SMAW electrode under AWS classification uses the third digit to define the:
- A. Welding position.
- B. Strength of the filler metal.
- C. Coating characteristics.
- D. Chemical composition.
正解：A
質問 # 70
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