Question 1

The gas tungsten arc welding process is sometimes referred to as ____________________.

Accepted Answer

TIG
heliar

Question 2

​Why does the return water on a water-cooled GTAW torch flow out around the power cable?

Accepted Answer

A)  ​The electricity in the cable has to be protected from emitting RF from the high frequency starting voltage. 
B)  ​To reduce the number of hoses to the torch. 
C)  ​So a smaller power cable can be used. 
D)  ​It helps to heat the water a little more to prevent algae and mold from growing. 
A)  ​The electricity in the cable has to be protected from emitting RF from the high frequency starting voltage. 
B)  ​To reduce the number of hoses to the torch. 
C)  ​So a smaller power cable can be used. 
D)  ​It helps to heat the water a little more to prevent algae and mold from growing.

Question 3

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

Accepted Answer

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

Question 4

Which of the following is true of DCEN?

Accepted Answer

A)  With DCEN, arc starting with a high-voltage electrical discharge is more difficult. 
B)  With DCEN, the electrode becomes damaged in a short period of time. 
C)  With DCEN, a pointed tip concentrates the arc. 
D)  DCEN concentrates the heat in the tip of the electrode. 
A)  With DCEN, arc starting with a high-voltage electrical discharge is more difficult. 
B)  With DCEN, the electrode becomes damaged in a short period of time. 
C)  With DCEN, a pointed tip concentrates the arc. 
D)  DCEN concentrates the heat in the tip of the electrode.

Question 5

Explain how to clean and point a tungsten electrode.

Accepted Answer

The tungsten can be cleaned and pointed

Question 6

​The high frequency may be set so that it ______________for DC and ________________ for AC.

Accepted Answer

A)  ​automatically cuts off after the arc is established; is kept on continuously 
B)  ​is kept on continuously; goes off 
C)  ​is kept on continuously; automatically cuts off after the arc is established 
D)  ​automatically cuts off; goes off after one minute 
A)  ​automatically cuts off after the arc is established; is kept on continuously 
B)  ​is kept on continuously; goes off 
C)  ​is kept on continuously; automatically cuts off after the arc is established 
D)  ​automatically cuts off; goes off after one minute

Question 7

​Which type of tungsten electrode does not break evenly when trying to break off contamination?

Accepted Answer

A)  ​EWZr-1 
B)  ​EWLa-1 
C)  ​EWP 
D)  ​EWCe-2 
A)  ​EWZr-1 
B)  ​EWLa-1 
C)  ​EWP 
D)  ​EWCe-2

Question 8

​The improved electron emission of the ____ allows it to carry approximately 20% more current than pure tungsten.

Accepted Answer

A)  ​lanthanum tungsten 
B)  ​thoriated tungsten 
C)  ​zirconium tungsten 
D)  ​cerium tungsten 
A)  ​lanthanum tungsten 
B)  ​thoriated tungsten 
C)  ​zirconium tungsten 
D)  ​cerium tungsten

Question 9

Explain how hydrogen is used in shielding gases, and why it is restricted to stainless steels.

Accepted Answer

Hydrogen is not an inert gas and is not

Question 10

____________________, when added in percentages of up to 0.6 percent to tungsten, improves its current-carrying capacity.

Accepted Answer

The answer of ____________________, when added in percentages of up...

Question 11

​____ is relatively easy to ionize and thus is suitable for alternating-current applications and easier starts.

Accepted Answer

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

Question 12

____________________ is the time during which gas flows to clear out any air in the nozzle or surrounding the weld zone.

Accepted Answer

The answer of ____________________ is the time during which gas...

Question 13

____ has the poorest heat resistance and electron emission characteristic of all the tungsten electrodes.

Accepted Answer

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

Question 14

Which of the following is true of DCEP?

Accepted Answer

A)  Because DCEP does not put much heat on the tip, it is relatively cool. 
B)  With DCEP, the preferred electrode tip is pointed. 
C)  DCEP has the highest heat concentration on the electrode tip. 
D)  With DCEP, the point of the electrode tip is stable. 
A)  Because DCEP does not put much heat on the tip, it is relatively cool. 
B)  With DCEP, the preferred electrode tip is pointed. 
C)  DCEP has the highest heat concentration on the electrode tip. 
D)  With DCEP, the point of the electrode tip is stable.

Question 15

DCEP concentrates ____ of the arc heat on the plate, and ____ of the heat on the electrode.

Accepted Answer

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

Question 16

____________________ is a by-product of the natural gas industry.It is removed from natural gas as the gas undergoes separation for purification or refinement.

Accepted Answer

The answer of ____________________ is a by-product of the natural...

Question 17

The ____________________ at which an alternating current cycles is the rate at which it makes a full change in direction.

Accepted Answer

The answer of The ____________________ at which an alternating current...

Question 18

Water hose fittings have ____ threads, and gas hose fittings have ____ threads.

Accepted Answer

A)  right-hand, left-hand 
B)  left-hand, left-hand 
C)  right-hand, right-hand 
D)  left-hand, right-hand 
A)  right-hand, left-hand 
B)  left-hand, left-hand 
C)  right-hand, right-hand 
D)  left-hand, right-hand

Question 19

Adding ____ has the same effect on the electrode characteristic as thorium, but is not radioactive.

Accepted Answer

A)  cerium 
B)  lanthanum 
C)  zirconium 
D)  pure tungsten 
A)  cerium 
B)  lanthanum 
C)  zirconium 
D)  pure tungsten

Question 20

The ____________________ is the cone-shaped sleeve that holds the electrode in the torch.

Accepted Answer

The answer of The ____________________ is the cone-shaped sleeve that...

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

The gas tungsten arc welding process is sometimes referred to as ____________________.

​Why does the return water on a water-cooled GTAW torch flow out around the power cable?

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

Which of the following is true of DCEN?

Explain how to clean and point a tungsten electrode.

​The high frequency may be set so that it ______________for DC and ________________ for AC.

​Which type of tungsten electrode does not break evenly when trying to break off contamination?

​The improved electron emission of the ____ allows it to carry approximately 20% more current than pure tungsten.

Explain how hydrogen is used in shielding gases, and why it is restricted to stainless steels.

____________________, when added in percentages of up to 0.6 percent to tungsten, improves its current-carrying capacity.

​____ is relatively easy to ionize and thus is suitable for alternating-current applications and easier starts.

____________________ is the time during which gas flows to clear out any air in the nozzle or surrounding the weld zone.

____ has the poorest heat resistance and electron emission characteristic of all the tungsten electrodes.

Which of the following is true of DCEP?

DCEP concentrates ____ of the arc heat on the plate, and ____ of the heat on the electrode.

____________________ is a by-product of the natural gas industry.It is removed from natural gas as the gas undergoes separation for purification or refinement.

The ____________________ at which an alternating current cycles is the rate at which it makes a full change in direction.

Water hose fittings have ____ threads, and gas hose fittings have ____ threads.

Adding ____ has the same effect on the electrode characteristic as thorium, but is not radioactive.

The ____________________ is the cone-shaped sleeve that holds the electrode in the torch.

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

Why does the return water on a water-cooled GTAW torch flow out around the power cable?

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

The high frequency may be set so that it for DC and __ for AC.

Which type of tungsten electrode does not break evenly when trying to break off contamination?

The improved electron emission of the ____ allows it to carry approximately 20% more current than pure tungsten.

____ is relatively easy to ionize and thus is suitable for alternating-current applications and easier starts.

DCEP concentrates of the arc heat on the plate, and of the heat on the electrode.

Water hose fittings have threads, and gas hose fittings have threads.