30 Gas Metal and Flux Cored Arc Welding

The gas metal arc welding (GMAW) process involves:

• using a consumable wire electrode and shielding gas to join metals.

• using a non-consumable tungsten electrode without shielding gas.

• joining metals by applying pressure and heat from an external source.

• using a flux-coated rod without shielding gas.

The flux-cored arc welding (FCAW) process is best described as:

• A welding process that uses a tubular wire filled with flux and an electric arc to join metals.

• A welding process that uses a solid wire and shielding gas only.

• A welding process that uses a stick electrode coated with flux.

• A welding process that uses a laser beam to join metals.

The purpose of GMAW/FCAW equipment components and settings is to:

• Control and optimize the welding process for quality and efficiency.

• Increase the temperature of the welding area only.

• Reduce the amount of shielding gas used.

• Eliminate the need for filler metal in welding.

Select the appropriate electrode and shielding gas for a welding job.

• E7018 electrode with CO2 shielding gas

• E6013 electrode with argon shielding gas

• E308L electrode with helium shielding gas

• E7018 electrode with argon shielding gas

To perform maintenance, what should you do to an electrode wire?

• Change it

• Bend it

• Paint it

• Ignore it

The four primary metal transfer modes are:

• Short-circuit, globular, spray, and pulsed-spray.

• Short-circuit, fusion, arc, and plasma.

• Spray, fusion, arc, and globular.

• Pulsed-spray, plasma, arc, and short-circuit.

Fill in the blank: To produce a good weld, you must control ______ variables.

• welding

• temperature

• pressure

• speed

Fill in the blank: You should take appropriate safety precautions when ______ or FCAW welding.

• GMAW

• SMAW

• TIG

• Oxy-fuel

Fill in the blank: Weld a practice pad using ______.

• GMAW

• SMAW

• FCAW

• OAW

What does GMAW stand for?

• Gas metal arc welding

• Gas manual arc welding

• General metal arc welding

• Gas metal alloy welding