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25 Cards in this Set
- Front
- Back
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Define and describe GMAW process. |
An arc welding process that uses an arc between a filler metal &a a weld puddle. Shielding gas is supplied by an external source. |
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List the basic equipment components required for the sit-up of a GMAW outfit. |
Welding power source. Welding gun and cable. Wire feeder compatible with source. Spoil wire filler. Shielded gas and equipment. |
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How are GMAW guns rated. |
Current carrying capacity. |
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The major factor in choosing between an air cooled and water cooled gun is. |
Current/Voltage. |
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What is meant by mode of metal transfer. |
The way the weld metal transfers across the arc from the end of the electrode to the weld zone. |
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Spray transfer employs higher |
Voltage. |
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Minimum % of Argon required in order to achieve spray transfer is. |
85% |
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What position can short circuit transfer be used in. |
All positions. |
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what is the major advantage of pulse spray transfer. |
All position welds on thinner metals. |
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GMAW may be used in the semi-auto or auto operation modes. |
True. |
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When the electrode comes in contact with the weld pool it is classified as what mode of transfer. |
Short circuiting transfer |
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Very fine droplets of metal transfer across the arc in an axial fashion, describes. |
Spray transfer. |
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Which GMAW mode of metal transfer is best suited for all position welding. |
Pulse spray arc transfer. |
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What type of welding power source is most often used for GMAW. |
Constant Voltage. |
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Constant arc voltage (CAV) machines produce what kind of volt/amp curve. |
Relatively flat volt amp curve. |
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What type of bolt-amp curve does a constant current (CC) machine produce. |
Drooping. |
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A welding machine that produces an almost horizontal output slope is a. |
Constant arc voltage machine. |
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What is the main function of the drive roll. |
Move wire through the cable liner to the gun or welding head. |
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Which drive roll design is preferred for GMAW using solid wire. |
V- groove. |
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Which drive roll design is preferred for GMAW using solid wire. |
V- groove. |
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What controls voltage on a CV machine. |
Wire feed speed. |
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To increase arc length when welding with GMAW, you would. |
Increase arc voltage. |
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When using GMAW, an increase in the arc voltage produces a: |
Wider arc stream and shallower penetration. |
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When using GMAW, an increase in the arc voltage produces a: |
Wider arc stream and shallower penetration. |
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With a constant speed wire drive unit, what variable must be manipulated in order to increase burn off rate of the wire electrode. |
Wire feed speed. |
