Quiz#2 GTAW Equipment

What type of shielding gas is typically used for the GTAW process?

• Argon

• Helium

• Carbon dioxide

• Both a and b

Autogenous welding is:

• a GTAW technique with filler wire.

• done with or with out filler wire.

• done without filler wire.

• none of these.

Air cooled torches can operate at a maximum amperage of:

• 100 amps

• 200 amps

• 300 amps

• 400 amps

A collet body is one of:

• the only pieces that will work in a typical GTAW torch assembly.

• the five pieces that can be used to make up a typical GTAW torch assembly.

• the pieces of the torch assembly that is interchangeable with the collet.

• the pieces of the torch assembly that is optional when setting up the GTAW torch.

What polarity should a welder set a power source on for GTAW with steel?

• DCEP

• DCEN

• AC

• none of these

GTAW process power sources are:

• CC (Constant Current)

• CV (Constant Voltage)

• AV (Average Voltage)

• EC (Extra Current)

7. For DCEN welding, on a pedestal grinder the electrode (tungsten) tip should be:

• Rounded

• Ground flat, as you press the tungsten into the grinding wheel.

• Ground longitudinally so any grind marks run lengthwise and rotate the electrode to produce an even taper.

• Just break the end off and go for it.

What is the problem with a poorly prepared tungsten electrode or a tungsten electrode that has been touched and contaminated?

• Nothing, a skilled welder should be able to handle it!

• The contamination and poor preparation improves arc stability.

• Causes poor welding and makes the arc difficult to control.

• Nothing, it is safer.

Gas tungsten arc welding makes use of:

• Shielding gas to prevent oxidation.

• A constant current welding machine.

• Non consumable tungsten electrode.

• All of these.

Nozzles are sized in 1/16'' increments. So, respectively, if a number 6 nozzle is 3/8'' what size would a number 8 be?

• 3/8''

• 1/2''

• 1/4''

• 5/8''