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41 Cards in this Set
- Front
- Back
- 3rd side (hint)
GMAW & MIG stand for what? |
Gas metal arc welding & metal inert gas |
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Computers or other sensitive electronic parts that are within __________ of the weld site should be removed. |
300mm (12") |
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Pressure is also known as: |
Voltage |
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The more voltage, the faster the __________. |
Electrons |
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The volume is also known as: |
Current |
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Current is also known as: |
Amperage |
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__________ is the limit of the flow of electrons. This also is converted to heat energy. |
Resistance |
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On MIG welded, if the voltage is increased, so is the _________. |
Heat |
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The wire feed rate on a MIG welder also sets the_________. The faster the wire feed, the higher the __________. |
Current |
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__________ is when the electrode is positive and the work piece is negative. This is also used most often for collision repairs. |
Reverse polarity |
Also known as DC reverse |
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What type of welding is recommended for all positions when welding with flux-cored wire? |
Straight polarity |
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What is the preferred method when using very thin welding wire along with lower current and voltage. |
Short-circuit transfer |
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Collision repair MIG welders generally have one amp for every __________ of metal thickness. |
.025mm (.001") |
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How many minutes or of 10 a welding machine can safely operate continuously at a rated amperage is known as what? |
Duty cycle |
This is listed as a percentage. |
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The electrode wire recommended for collision repair uses what code from the American Welding Society (AWS)? |
ER70S-6 |
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Flux-cored wire is not recommended for steels thinner than _____? |
18 gauge |
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Electrode diameter is selected based on what? |
Material thickness and amperage requirements |
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________ wire is recommended when welding between 30-90 amps. |
0.6mm (.023") |
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________ wire is recommended when welding between 40-145 amps. |
0.8mm (.030") |
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________ wire is recommended when welding between 50-180 amps. |
0.9mm (.035") |
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Most collision repairs use a mix of ___/___ shielding gas. |
75% argon/25% CO2 |
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For collision repair, welding flow meters are generally set to ________. |
25-30 cfh |
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________ transfers current to the electrode wire, and is usually made of copper or copper alloy. |
Contact tip |
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Any surface that is going to be welded must be cleaned, but __________ should not be removed. |
Galvanized coatings |
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Corroding zinc forms zinc oxide which protects this Steel. This is called __________. |
Sacrificial corrosion |
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The __________ technique is when the welding gun is pointed at and dragged away from the weld. |
Pull |
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The ________ technique is when the welding gun is pointed and pushed away from the weld. |
Push |
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Both the push and pull technique positions the welding gun at what angle to the workpiece? |
70° |
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When using 0.6 mm (.023") wire, the stick out should be __________. |
6-13 mm (1/4-1/2") |
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If stick out is too short, penetration will __________. If it is too long, penetration will __________. |
Increase; decrease |
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When welding thin gauge metal in the vertical position, it is usually easiest if the welding gun is angled: |
Upward and pulled down |
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Welding techniques used to manage heat buildup include making: |
Stitch or skip welds |
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A __________ weld is made by starting and stopping briefly between welds to allow some cooling. |
Stitch |
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A __________ weld is made by making __________ long welds in one direction at random locations along the joint and then filling the spaces in, making a continuous weld, or by starting from the middle and making a short weld to the outside in both directions. |
Skip; 13-19 mm (1/2-3/4") |
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What is the number one issue, for collision repair, in welds that are generally caused by lack of shielding gas? |
Porosity |
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Gas metal arc welding (GMAW) is a wire-feed type of __________ welding. |
Fusion |
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Advantages of GMAW include a small __________ zone around the weld. |
Heat affected |
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GMAW machines are plugged into ______ power source power and converted to ______. |
AC/DC |
Also a well-known rock band |
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What are the three types of transfer methods? |
Spray arc, globular , Short Circuit |
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Plug weld holes should be the size recommended by the vehicle maker or _________ if no recommendation exists? |
8 mm (5/16") |
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To make a plug weld, the welding gun should be at a _______ angle to base metal. |
90° |
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