API-577 問題練習

Question No : 1
Which of the following statements is true?

• A.PQRs qualified on P8 materials also qualify for P1 materials.
• B.Welding procedures must be supported by more than one PQ
• C.All PQRs must be qualified with impact testing.
• D.One PQR may support several WPSs.

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Question No : 2
A limitation of a stud arc welding (SW) process is:

• A.Welding rates are significantly lower than those obtained with SMA
• B.Process is primarily suitable for only carbon steel and low alloy steels.
• C.Process is limited to a flat position.
• D.Weld is not visible during the welding process.

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Question No : 3
What term is used to describe the mechanical working of metals using impact blows?

• A.Hammering
• B.Mechanical stress relieving
• C.Needle gunning
• D.Peening

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Question No : 4
What increases when a welder increases the amperage?

• A.Voltage
• B.Arc length
• C.Heat
• D.Travel speed

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Question No : 5
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.Carbon steel will burn in the presence of chlorine and high heat.
• D.Hydrogen released during welding process can initiate hydrogen-assisted cracking.

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Question No : 6
A-number groupings are based upon the:

• A.Chemical composition of the deposited weld metal.
• B.Comparable base metal ultimate strength values.
• C.Weldability characteristics of the metal.
• D.Type and strength of base metal.

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Question No : 7
For SMAW welding, the last number of the electrode identification identifies:

• A.Chemical composition.
• B.Electrode operating characteristics.
• C.Welding position.
• D.Coating operating characteristics.

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Question No : 8
If a test specimen from a welded coupon should fail during PQR mechanical tests:

• A.Three out of four of the required test specimens must pass.
• B.The test coupon fails and a new coupon is required.
• C.Two additional test specimens from the coupon must be tested and pass.
• D.The WPS fails.

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Question No : 9
The simplest weldability tests are those that evaluate:

• A.Porosity and slag inclusions of the weld.
• B.Cracking and corrosion resistance of the weld.
• C.Strength and ductility of the weld.
• D.Ductility and hardness of the weld.

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Question No : 10
Rules for qualifying welding operators using radiography on a production weld require what minimum weld length to be examined?

• A.6 in. (150 mm)
• B.12 in. (300 mm)
• C.24 in. (600 mm)
• D.36 in. (900 mm)

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Question No : 11
What is the purpose of a PQR?

• A.To provide direction to the welder making production welds.
• B.To establish the properties of the weldment.
• C.To document that a welder has correctly followed a WP
• D.To establish a welder's capability to make a quality weld.

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Question No : 12
A crack with its major axis oriented approximately perpendicular to the weld axis is called a:

• A.Lamellar crack.
• B.Non-directional crack.
• C.Transverse crack.
• D.Perpendicular crack.

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Question No : 13
According to the PQR 8025, does the thickness range qualified concur with the thickness range as stated on the WPS 802?

• A.Yes, but only for thicknesses greater than .280"
• B.No, the material thickness on the PQR should be .375"
• C.Yes, the PQR qualifies the ranges as stated on the WPS
• D.No, the PQR thickness should have been .560"

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Question No : 14
A welding engineer or inspector should be notified when a weld has failed a weld quality test more than how many times in order to help determine the cause of the test failure?

• A.ONCE
• B.TWICE
• C.THREE TIMES
• D.FOUR TIMES

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Question No : 15
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

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