Question 1

The ____________________ directs the shielding gas directly on the welding zone.

Accepted Answer

nozzle
cup

Question 2

____ is very well suited for making welds on steel, steel alloys (including stainless), nickel alloys, and most other metals other than aluminum or magnesium.

Accepted Answer

A)  Zirconium tungsten 
B)  Pure tungsten 
C)  Thoriated tungsten 
D)  Lanthanum tungsten 
A)  Zirconium tungsten 
B)  Pure tungsten 
C)  Thoriated tungsten 
D)  Lanthanum tungsten

Question 3

AC concentrates about ____ of its welding heat on the work and ____ on the tungsten.

Accepted Answer

A)  2/3, 1/3 
B)  1/3, 2/3 
C)  1/2, 1/2 
D)  1/4, 3/4 
A)  2/3, 1/3 
B)  1/3, 2/3 
C)  1/2, 1/2 
D)  1/4, 3/4

Question 4

____ is denser than air, so it effectively shields welds in deep grooves in the flat position.

Accepted Answer

A)  Nitrogen 
B)  Helium 
C)  Argon 
D)  Hydrogen 
A)  Nitrogen 
B)  Helium 
C)  Argon 
D)  Hydrogen

Question 5

​Why is an inert shielding gas required for GTA welding?

Accepted Answer

A)  ​To keep the air away from the hot tungsten and molten weld metal. 
B)  ​To help remove the welding fumes to make it easier to see the weld pool. 
C)  ​It helps to reduce the UV light that can cause skin burns. 
D)  ​All of the above 
A)  ​To keep the air away from the hot tungsten and molten weld metal. 
B)  ​To help remove the welding fumes to make it easier to see the weld pool. 
C)  ​It helps to reduce the UV light that can cause skin burns. 
D)  ​All of the above

Question 6

____ results in welds with deep penetration, and a smaller-size tungsten can be used.

Accepted Answer

A)  DCEN 
B)  ACHF 
C)  DCEP 
D)  DCRP 
A)  DCEN 
B)  ACHF 
C)  DCEP 
D)  DCRP

Question 7

Explain why the heat of the arc, which is much higher than the melting point of tungsten, does not actually melt the tungsten electrode.

Accepted Answer

The thermal conductivity of tungsten and

Question 8

With ____, penetration and bead profile are sensitive to arc length, and the long arcs needed for feeding filler wires are more difficult to control.

Accepted Answer

A)  nitrogen 
B)  argon 
C)  hydrogen 
D)  helium 
A)  nitrogen 
B)  argon 
C)  hydrogen 
D)  helium

Question 9

In GTAW, the arc temperature is around ____ degrees Fahrenheit.

Accepted Answer

A)  3,000 
B)  6,000 
C)  11,000 
D)  17,000 
A)  3,000 
B)  6,000 
C)  11,000 
D)  17,000

Question 10

​The squarewave provides the welder with a current that allows the molten weld pool to _______________.

Accepted Answer

A)  ​be cleaner and reduces the need to clean all of the oxides off of the underside of the weld joint 
B)  ​flow freely onto the base metal with minimum fusion for thinner metals 
C)  ​have more gas coverage of the weld at a slower flow rate 
D)  ​have both deeper penetration and faster solidification 
A)  ​be cleaner and reduces the need to clean all of the oxides off of the underside of the weld joint 
B)  ​flow freely onto the base metal with minimum fusion for thinner metals 
C)  ​have more gas coverage of the weld at a slower flow rate 
D)  ​have both deeper penetration and faster solidification

Exam 16: Gas Tungsten Arc Welding Equipment, Setup, Operation, and Filler Metals

The ____________________ directs the shielding gas directly on the welding zone.

____ is very well suited for making welds on steel, steel alloys (including stainless), nickel alloys, and most other metals other than aluminum or magnesium.

AC concentrates about ____ of its welding heat on the work and ____ on the tungsten.

____ is denser than air, so it effectively shields welds in deep grooves in the flat position.

​Why is an inert shielding gas required for GTA welding?

____ results in welds with deep penetration, and a smaller-size tungsten can be used.

Explain why the heat of the arc, which is much higher than the melting point of tungsten, does not actually melt the tungsten electrode.

With ____, penetration and bead profile are sensitive to arc length, and the long arcs needed for feeding filler wires are more difficult to control.

In GTAW, the arc temperature is around ____ degrees Fahrenheit.

​The squarewave provides the welder with a current that allows the molten weld pool to _______________.

Introduction to Welding

Safety in Welding

Shielded Metal Arc Equipment, Setup, and Operation

Shielded Metal Arc Welding of Plate

Shielded Metal Arc Welding of Pipe

Shielded Metal Arc Welding Aws Sense Certification

Flame Cutting

Plasma Arc Cutting

Related Cutting Processes

Gas Metal Arc Welding Equipment, Setup, and Operation

Gas Metal Arc Welding

Flux Cored Arc Welding Equipment, Setup, and Operation

Flux Cored Arc Welding

Gas Metal Arc and Flux Cored Arc Welding of Pipe

Gas Metal Arc and Flux Cored Arc Welding Aws Sense Certification

Gas Tungsten Arc Welding of Plate

Gas Tungsten Arc Welding of Pipe

Gas Tungsten Arc Welding Plate and Pipe Aws Sense Certification

Shop Math and Weld Cost

Reading Technical Drawings

Welding Joint Design and Welding Symbols

Fabricating Techniques and Practices

Welding Codes and Standards

Testing and Inspection of Welds

Welding Metallurgy

Weldability of Metals

Filler Metal Selection

Welding Automation and Robotics

Other Welding Processes

Oxyfuel Welding and Cutting Equipment, Setup, and Operation

Oxyacetylene Welding

Brazing, Braze Welding, and Soldering

Filters

AC concentrates about of its welding heat on the work and on the tungsten.

Why is an inert shielding gas required for GTA welding?

The squarewave provides the welder with a current that allows the molten weld pool to _______________.