GMAW: Fundamentals
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You'll demonstrate your knowledge of GMAW techniques by identifying fundamental terms.
Topics of this game:
- Which type of metal transfer is limited to use on thin materials?
- _____________ is not suitable for all position welding.
- The short-circuiting electrode contacts the molten weld pool in the range of ________ times per second.
- With ___________, a globular transfer takes place when the current is relatively low, regardless of the type of shielding gas.
- Globular transfer is characterized by a drop size with a diameter _____________ than that of the electrode, which generally limits successful transfer to the flat position.
- If the arc length for globular transfer is too _______________ (low voltage), the enlarging drop may short to the workpiece, become super-heated, and disintegrate, producing spatter.
- Spray transfer welding requires an _______________ shielding.
- In spray transfer mode, the ____________ droplets are smaller than the electrode diameter and spatter is negligible, if not totally eliminated.
- By reducing the average arc energy and the wire-melting rate, pulsing makes the desirable features of __________ transfer available for joining sheet metals and welding thick metals in all positions.
- When all other variables are held constant, the welding amperage varies with the ______________.
- When all other variables are held constant, an increase in welding current results in all except:
- When the welding gun lead is connected to the positive terminal, the polarity is designated as ______________, previously called reverse polarity.
- ____________ yields a stable arc, smooth metal transfer, relatively low spatter, good weld bead characteristics, and great depth of penetration for a wide range of welding currents.
- With all variables held constant, arc voltage is directly related to ________________.
- Which is not true for any specific value arc voltage.
- At ___________ travel speeds, the welding arc impinges on the molten weld pool, reducing the effective penetration.
- An increase in the electrode extension results in ___________ in its electrical resistance; the filler metal will deposit a narrow, high-crowned weld bead.
- Electrode orientation affects bead shape and penetration to _____________ arc voltage or travel speed.
- When the electrode points opposite from the direction of travel, the technique is called _________ welding with a drag angle.
- When the electrode points in the direction of travel, the technique is called ___________ welding with a lead angle.
- A larger electrode requires _____________ minimum current than a smaller electrode for the same metal transfer characteristics
