Exam 14: Gas Metal Arc and Flux Cored Arc Welding of Pipe

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​If the contact tube tip melts, the copper from the tip might enter the weld pool and make a _____________________ in the weld.

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​very brittle defect

​It is faster to make the root weld using the downhill technique if ______________________.

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D

​What can be done to protect the contact tube tip from damage?

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D

​The cover pass cannot be any wider than ____ wider than the groove being welded.

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​For a visual inspection of a pipe weld, what is the acceptable discontinuity for incomplete fusion?

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​Which tool might be used when assembling a joint for a code quality weld?

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​As the 1G weld passes over the top of the pipe and starts downhill, change to a slight ________ angle that will increase to approximately a _______ angle.

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​Describe how the end of a pipe is to be prepared for welding.

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​What should the gun angle and travel direction be for making a 1G weld from the 1:30 to 10:30 positions?

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​Why is the root pass weld started on top of a tack weld?

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​For a visual inspection of a pipe weld, what is the acceptable discontinuity for cracks?

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​The maximum diameter of any single porosity shall not exceed ______________.

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​Unless a backing ring is used, most root passes are made with the _____ process.

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​Which of the following is not an application for a pipe socket?

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​How should the weld progress if the root opening is wider than normal?

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​The root pass welds must start and end on the ______________.

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​Why are the ends of tack welds ground to a featheredge?

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​Filler passes only need to have complete fusion to the previous weld and do not need to have ________.

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​According to the API code, the maximum offset for pipes of the same nominal diameter is ____.

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​The hot pass can be made ________________; however, it is more difficult to keep good fusion using the ____________technique.

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