Exam 11: Gas Metal Arc Welding Equipment and Materials

For the feed rollers to properly grip and feed the filler metal, they must have proper tension applied.

GMAW-S can be used with a wide range of electrode diameters and shielding gases.

The contact tube may get as hot as 300°C when you are welding with an air-cooled GMAW torch.

Pressing the gun switch to start the wire feeder is called tricking the gun.

The ____ wire feed system has two motors, one located at each end.

Often the GMA axial spray metal transfer process is referred to simply as ____________________.

The modes of metal transfer are short-circuit transfer, axial spray transfer, globular transfer, and pulsed-arc transfer ____.

GMA welding can easily be used in all positions because the weld pool is small and the ____.

The gas diffuser transfers the current to the ____.

The terms voltage, volts, and ____________________ can all be interchanged when referring to electrical pressure.

Axial spray arc provides the highest metal transfer rate and that means higher productivity.

A contact tube can be removed and cleaned with a set of oxyacetylene torch tip cleaners to extend the useful life of the contact tube except for when the material is aluminum wire.

In the ____ system, the small diameter electrode wire must have enough stiffness to be pushed through the conduit without kinking.

Inert gases are very soluble in molten metal.

The most commonly used gases for ferrous metals are CO₂, argon with 2 to 5% oxygen added, and ____________________ with 25% CO₂ added.

The ____________________ is a flexible hollow tube through which the wire is fed from the wire feed unit to the gun.

The steel, copper, brass, or plastic wire guides are a simple component of the feeder system.

In ____ systems, a small motor is located in the gun to pull the wire through the conduit.

The speed of the motor used in wire feed units can be continuously adjusted over the desired wire feed speed range.

On ____, if the tube is not vertical, the reading is not accurate.