True or False:  Modifications made in the composition of electrodes consist of deoxidizers and other scavengers.  This is done to minimize porosity in the weld or to assure satisfactory weld metal mechanical properties.

Deoxidizers most commonly used in steel electrodes are ____________, manganese, and silicon.

Wire feed speeds for GMAW range from approximately ________________.

The primary function of the _____________ is to exclude the atmosphere from contact with the molten weld metal.

Pure argon shielding on ferrous alloys causes an _____________ and a tendency for undercut to occur.

Additions to argon of oxygen between 1% and 5% or _______________ between 3% and 25% produces a noticeable improvement in arc stability and freedom from undercuts by eliminating the arc wander caused by cathode sputtering.

Additions up to 20% of ______________ provides adequate shielding and desirable arc characteristics for short-circuiting, spray, and pulse-spray transfer welding.

Spray transfer cannot be achieved with a _____________ shield.

Which electrode is used for GMAW steel?