Question 1

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

Accepted Answer

nozzle

Question 2

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

Accepted Answer

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

Question 3

Which of the following is true of erosion of the tungsten electrode?

Accepted Answer

A)  Slow erosion results in limited tungsten inclusions in the weld. 
B)  Erosion can be limited using DCEP current. 
C)  Erosion can be completely eliminated. 
D)  The eroded metal does not transfer across the arc. 
A)  Slow erosion results in limited tungsten inclusions in the weld. 
B)  Erosion can be limited using DCEP current. 
C)  Erosion can be completely eliminated. 
D)  The eroded metal does not transfer across the arc. A

Question 4

Which of the following is true of DCEN?

Accepted Answer

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

Question 5

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

Accepted Answer

The answer of The ____________________ at which the current cycles...

Question 6

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

Accepted Answer

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

Question 7

The tungsten point angle can be set between a range of _____ degrees.

Accepted Answer

A)  5-15 
B)  10-60 
C)  50-80 
D)  150-200 
A)  5-15 
B)  10-60 
C)  50-80 
D)  150-200

Question 8

If high frequency is not used, it will be necessary to use the ____________________ technique to start the arc .

Accepted Answer

The answer of If high frequency is not used, it...

Question 9

Explain how and why to remelt tungsten.

Accepted Answer

After tungsten has been broken squarely,

Question 10

Which of the following is true of DCEP?

Accepted Answer

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

Question 11

In order to get a good GTA weld on thick sections of metal, especially ____________________, you will need to preheat it.

Accepted Answer

The answer of In order to get a good GTA...

Question 12

Which of the following is true of breaking and remelting tungsten?

Accepted Answer

A)  It should be melted with a DCEN current. 
B)  It should be broken squarely. 
C)  It should be melted by striking an arc on a piece of carbon. 
D)  It should not be melted by striking an arc on copper, as it will contaminate the tungsten. 
A)  It should be melted with a DCEN current. 
B)  It should be broken squarely. 
C)  It should be melted by striking an arc on a piece of carbon. 
D)  It should not be melted by striking an arc on copper, as it will contaminate the tungsten.

Question 13

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

Accepted Answer

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

Question 14

The useful life of a ceramic nozzle is affected by the _____________.

Accepted Answer

A)  current level and proximity to the work 
B)  tungsten type and shielding gas flow rate 
C)  whether the torch is air or water cooled 
D)  type of current and type of base metal 
A)  current level and proximity to the work 
B)  tungsten type and shielding gas flow rate 
C)  whether the torch is air or water cooled 
D)  type of current and type of base metal

Question 15

Due to its hardness, when hand grinding tungsten, it will become hot, and its high ____________________ means that the heat will be transmitted quickly to your fingers.

Accepted Answer

thermal co

Question 16

____________________ 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 17

Which of the following is not true of the water-cooled GTA welding torch?

Accepted Answer

A)  It is more efficient than an air-cooled torch 
B)  It is more portable than an air-cooled torch. 
C)  It can use a smaller power cable. 
D)  Water pressures higher than 35 psi may cause the water hoses to burst. 
A)  It is more efficient than an air-cooled torch 
B)  It is more portable than an air-cooled torch. 
C)  It can use a smaller power cable. 
D)  Water pressures higher than 35 psi may cause the water hoses to burst.

Question 18

Tungsten with the highest level of lanthanum oxide is classified as ____.

Accepted Answer

A)  EWTh-2 
B)  EWLa-1.5 
C)  EWLa-2 
D)  EWZr-1 
A)  EWTh-2 
B)  EWLa-1.5 
C)  EWLa-2 
D)  EWZr-1

Question 19

Which of the following is an inert gas?

Accepted Answer

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

Question 20

Which of the following is true of grinding tungsten electrodes?

Accepted Answer

A)  A grinder should never be used to clean contaminated tungsten. 
B)  The grinder used to sharpen tungsten should have a coarse stone. 
C)  A fine, hard grinding stone will result in more tungsten breakage and a poor finish. 
D)  If the grinder is used for metals other than tungsten, particles of these metals may become trapped on the tungsten as it is ground, resulting in contamination when the arc is started. 
A)  A grinder should never be used to clean contaminated tungsten. 
B)  The grinder used to sharpen tungsten should have a coarse stone. 
C)  A fine, hard grinding stone will result in more tungsten breakage and a poor finish. 
D)  If the grinder is used for metals other than tungsten, particles of these metals may become trapped on the tungsten as it is ground, resulting in contamination when the arc is started.

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

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

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

Which of the following is true of erosion of the tungsten electrode?

Which of the following is true of DCEN?

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

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

The tungsten point angle can be set between a range of _____ degrees.

If high frequency is not used, it will be necessary to use the ____________________ technique to start the arc .

Explain how and why to remelt tungsten.

Which of the following is true of DCEP?

In order to get a good GTA weld on thick sections of metal, especially ____________________, you will need to preheat it.

Which of the following is true of breaking and remelting tungsten?

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

The useful life of a ceramic nozzle is affected by the _____________.

Due to its hardness, when hand grinding tungsten, it will become hot, and its high ____________________ means that the heat will be transmitted quickly to your fingers.

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

Which of the following is not true of the water-cooled GTA welding torch?

Tungsten with the highest level of lanthanum oxide is classified as ____.

Which of the following is an inert gas?

Which of the following is true of grinding tungsten electrodes?

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 Equipment, Setup, and Operation

Plasma Arc Cutting Equipment, Setup, and Operation

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

Welding Metallurgy

Weldability of Metals

Filler Metal Selection

Welding Automation and Robotics

Other Welding Processes

Oxyfuel Welding Equipment, Setup, and Operation

Oxyacetylene Welding and Brazing, Braze Welding, and Soldering

Filters

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

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