29205-15 GMAW/FCAW Equipment and Filler Metals

The welding process that uses flux-cored wire without the use of an external shielding gas is called _____.

• gas-shielded FCAW (FCAW-G)

• shielded metal arc welding (SMAW)

• gas metal arc welding (GMAW)

• self-shielding FCAW (FCAW-S)

If the tongue and lace area of a welder’s safety shoes are exposed, the welder should _____.

• add cotton boot covers

• wear leather spats or chaps

• position the exposed area away from the arc

• use shielding gas to protect the exposed area

A powered extraction system is a valuable tool for _____.

• feeding wire electrode

• removing welding fumes

• directing shielding gas

• reducing welding spatter

Spray transfer, globular transfer, and pulsed transfer are _____.

• GMAW metal transfer modes

• SMAW metal transfer modes

• types of GMAW/FCAW guns

• types of external wire feeders

A variation of spray transfer welding in which current is cycled from high to low is _____.

• short circuit welding

• globular transfer welding

• radial transfer welding

• pulsed transfer welding

Which shielding gas improves FCAW weld penetration?

• Argon

• Carbon dioxide

• Oxygen

• Hydrogen

The operating voltage of a welding machine, which is produced during welding, is also known as the _____.

• open-circuit voltage

• utility voltage

• primary input voltage

• arc voltage

In engines that power generators, the engine speed is controlled by _____.

• governors

• rectifiers

• transformers

• alternators

A duty cycle is the percentage of a 10-minute period during which a welding machine can continuously _____.

• maintain a constant voltage as the output current varies

• produce a constant current over a wide voltage range

• produce its rated amperage without overheating

• establish an arc between the end of the wire electrode and the workpiece

Welder power sources usually contain controls for adjusting arc voltage, slope, and _____.

• resistance

• inductance

• capacitance

• conductance