Welding Assessment #3

GTAW uses what type of gases for shielding?

• Active

• Inert

• A combination of active and inert

• Volatile

An EWTh-2 tungsten is

• 1% thoriated

• 2% thoriated

• 2% lanthanated

• Pure tungsten

What current do you use to weld Aluminum?

• DCEP

• DCEN

• ACEN

• AC

What flow rate would be proper when using argon shielding gas?

• 10-20 CFH

• 40-50 CFH

• 10-20 lbs

• 40-50 lbs

What current causes the most heat at the tungsten?

• DCEN

• ACEP

• AC

• DCEP

The shape of the end of the tungsten when using DCEN should be

• Balled

• Tapered

• Blunt

• Squared

A gray band tungsten is

• EWP

• EWTh-2

• EWCe-2

• EWLa-1.5

The recommended tungsten for welding Aluminum is

• EWTh-1

• EWTh-2

• EWTh-3

• EWP

High frequency units serve to

• Balance the AC sine wave

• Allow the arc to jump the gap

• Cool the tungsten

• Provide additional amperage

Safety considerations must be given when using argon because

• Argon will displace the air

• Argon is heavier than air

• Argon does not support life

• All the above