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25 Cards in this Set
- Front
- Back
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Who is required to wire up a welding power source |
Qualified electrical personnel
120103d pg 2 |
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Where do you find the procedure to wire up a welding power source? |
Equipment manufacture's operating manual
120103d pg 2 |
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How must a flow meter be mounted to get an accurate reading? Why? |
-The vertical position -The flow meter will give an incorrect reading if not mounted correctly
120103d pg 4 |
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What should the drive rolls match? |
Wire size & type
120103d pg 5 |
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Define Electrode Inclination |
(work angle) The position of the electrode in relation to the direction of travel.
120103d pg17 |
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When your electrode is at 0°, where is your electrode in relation to the direction traveling? |
The electrode is perpendicular(90°) to the direction of travel.
120103d pg17 |
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Why does flux core only use the Backhand method? |
To prevent slag inclusion in the weld.
120103d pg 17 |
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when loading the wire why must you always hold onto the loose end? |
Prevents the spool from unwinding and tangling. prevents the partial or complete loss of the spool.
120103d pg 7 |
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Why use the Jog switch if your machine has one? |
Activates the wire feeder without energizing the wire or activating the shielding gas.
120103d pg 7 |
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How tight should your your drive rolls be? |
At a point where you achieve a continuous feed without deforming or scarring the surface of the wire.
120103d pg 9 |
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where should a wire cleaner be placed? |
Just before the wire feeder.
120103d pg 10 |
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what should you adjust the spool brake to do? |
To allow the spool to rotate freely but with enough tension to prevent backlash.
120103d pg 10 |
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Contact tubes are not considered a consumable Item? a)True b)False |
b)False
120103d pg 14 |
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What can happen if you use to much anti-spatter compound? |
It can contaminate the weld and shorten the life of the nozzle.
120103d pg 15 |
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Define electrode angle? |
The position of the gun in relation to the included joint angle.
120103d pg 16 |
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If undercut occurs where should you point you electrode to eliminate it? |
Point it towards the undercut. (forces the undercut area to become hotter so the metal will flow to that point)
120103d pg 16 |
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Backhand or forehand, which one gives you better penetration? |
Backhand Inclination (15°-20°)
120103d pg 17 |
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What type of bead does Forehand inclination produce? |
Flatter with less penetration.
120103d pg 17 |
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What type of metal transfer are recessed contact tubes suitable for? |
Spray arc transfer
120103d pg 19 |
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Contact tips must be centered to ensure what? |
Equal gas penetration to the weld puddle
120103d pg 19 |
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contact tip must be centered to ensure what? |
equal gas distribution to the weld puddle
120103d pg 19 |
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what mode of metal transfer are recessed contact tips ment for? |
Spray arc transfer
120103d pg 19 |
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What can happen if to much spatter builds up between the nozzle & Contact tip? |
Can cause disruption to the gas flow and can cause an arc between the nozzle and tne contact tip.
120103d pg 21 |
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What can happen if your work lead connection is poor? |
It can cause an unstable arc.
120103d pg 21 |
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What is stubbing generally caused by? |
-excessive wire speed -low arc voltage -heavily scaled base metal
120103d pg 21 |
