Question 1

A thick piece of metal that is used to absorb heat is also called a(n) ____________________.

Accepted Answer

chill plate

Question 2

Describe how the velocity of the shielding gas and the torch angle affects the protective zone.

Accepted Answer

The velocity of the shielding gas affects the protective zone as the torch angle changes. As the velocity increases, a low-pressure area develops behind the cup. When the low-pressure area becomes strong enough, air is pulled into the shielding gas. The sharper the angle and the higher the flow rate, the possibility of contamination is increased by the onset of turbulence in the gas stream. This causes air to become mixed with the shielding gas. Turbulence caused by the shielding gas striking the work will also cause air to mix with the shielding gas at high velocities.

Question 3

What should be done to the end of the filler rod if it becomes oxidized?

Accepted Answer

A)  The end of the rod should be cut off. 
B)  Melt it off before it is going to be added to the weld pool. 
C)  Get a new piece of filler metal to restart the weld. 
D)  Nothing, the oxides are lighter than the weld metal and will float on top of the weld pool. 
A)  The end of the rod should be cut off. 
B)  Melt it off before it is going to be added to the weld pool. 
C)  Get a new piece of filler metal to restart the weld. 
D)  Nothing, the oxides are lighter than the weld metal and will float on top of the weld pool. A

Question 4

Which of the following is true of welding machine settings?

Accepted Answer

A)  The welding machine range is the same from machine to machine. 
B)  The setting will be the same for a given thickness of metal from machine to machine. 
C)  The setting will be the same for a given polarity from machine to machine. 
D)  The setting will differ for various sizes and types of tungsten from machine to machine. 
A)  The welding machine range is the same from machine to machine. 
B)  The setting will be the same for a given thickness of metal from machine to machine. 
C)  The setting will be the same for a given polarity from machine to machine. 
D)  The setting will differ for various sizes and types of tungsten from machine to machine.

Question 5

Which of the following is true of tungsten contamination?

Accepted Answer

A)  Tungsten contamination causes a weak weld and must be cleaned. 
B)  Tungsten particles will not show up, even if the weld is X-rayed. 
C)  Tungsten contamination is rare and easily controlled. 
D)  Tungsten particles in the weld will have no effect on the weld. 
A)  Tungsten contamination causes a weak weld and must be cleaned. 
B)  Tungsten particles will not show up, even if the weld is X-rayed. 
C)  Tungsten contamination is rare and easily controlled. 
D)  Tungsten particles in the weld will have no effect on the weld.

Question 6

The torch may be angled for better visibility, and still have the proper shielding ____________________.

Accepted Answer

The answer of The torch may be angled for better...

Question 7

Carbide precipitation is the combining of ____.

Accepted Answer

A)  carbon with chromium 
B)  carbide with hydrogen 
C)  carbide with water 
D)  carbon with oxygen 
A)  carbon with chromium 
B)  carbide with hydrogen 
C)  carbide with water 
D)  carbon with oxygen

Question 8

With ____, surface tension helps hold the metal in place, giving excellent bead contour.

Accepted Answer

A)  mild steel 
B)  aluminum 
C)  stainless steel 
D)  low carbon steel 
A)  mild steel 
B)  aluminum 
C)  stainless steel 
D)  low carbon steel

Question 9

The greater the contamination of a stainless steel weld, the ____ of the bead after the weld.

Accepted Answer

A)  lighter the color 
B)  redder the color 
C)  whiter the color 
D)  darker the color 
A)  lighter the color 
B)  redder the color 
C)  whiter the color 
D)  darker the color

Question 10

In the GTAW process, contamination left on the metal will be deposited in the weld because ____.

Accepted Answer

A)  the low arc temperature does not vaporize it 
B)  the low amperage does not allow it to be burned off 
C)  tungsten contamination is a constant problem that cannot be eliminated 
D)  there is no flux to remove it 
A)  the low arc temperature does not vaporize it 
B)  the low amperage does not allow it to be burned off 
C)  tungsten contamination is a constant problem that cannot be eliminated 
D)  there is no flux to remove it

Question 11

During the manufacturing process, sometimes pockets of primarily ____________________ gas become trapped inside low carbon and mild steels.

Accepted Answer

The answer of During the manufacturing process, sometimes pockets of...

Question 12

When tungsten touches the molten weld pool, ____________________ pulls the contamination up onto the hot tungsten.

Accepted Answer

The answer of When tungsten touches the molten weld pool,...

Question 13

Which of the following is a reason to use GTA welding?

Accepted Answer

A)  When the weld appearance is not important 
B)  When speed is required 
C)  When fine control of the welding process is not needed 
D)  When a close-tolerance, high-quality weld is required 
A)  When the weld appearance is not important 
B)  When speed is required 
C)  When fine control of the welding process is not needed 
D)  When a close-tolerance, high-quality weld is required

Question 14

Mild steel weld coupons can have the welds removed using an OFC torch, but welds on stainless and aluminum coupons will have to be cut out with a(n) ____________________ torch.

Accepted Answer

The answer of Mild steel weld coupons can have the...

Question 15

With ____, cleanliness is a critical factor.

Accepted Answer

A)  mild steel 
B)  aluminum 
C)  stainless steel 
D)  low carbon steel 
A)  mild steel 
B)  aluminum 
C)  stainless steel 
D)  low carbon steel

Question 16

What can cause porosity (tiny bubbles) to form on some welds on mild steel?

Accepted Answer

A)  A chemical reaction between the filler metal and the mild steel 
B)  Using the wrong type of tungsten electrode 
C)  Small pockets of CO2trapped inside of the steel during manufacturing 
D)  Too much heat and the metal begins to boil 
A)  A chemical reaction between the filler metal and the mild steel 
B)  Using the wrong type of tungsten electrode 
C)  Small pockets of CO2trapped inside of the steel during manufacturing 
D)  Too much heat and the metal begins to boil

Question 17

Why would a welder stick the end of the filler rod in the weld pool as the weld is being stopped?

Accepted Answer

A)  It accidentally happens sometimes but they would not do it on purpose. 
B)  To prevent dropping it when changing positions 
C)  To help to prevent crater cracking 
D)  It cools off the end of the filler rod to prevent oxidization. 
A)  It accidentally happens sometimes but they would not do it on purpose. 
B)  To prevent dropping it when changing positions 
C)  To help to prevent crater cracking 
D)  It cools off the end of the filler rod to prevent oxidization.

Question 18

Carbon is the primary alloy in the classification of low carbon and mild steel, and ranges from ____ for mild steel.

Accepted Answer

A)  0.01% to 0.15% 
B)  0.10% to 0.15% 
C)  0.15% to 0.20% 
D)  0.15% to 0.30% 
A)  0.01% to 0.15% 
B)  0.10% to 0.15% 
C)  0.15% to 0.20% 
D)  0.15% to 0.30%

Question 19

An oxide layer on aluminum is ____, while on iron it is ____.

Accepted Answer

A)  black, reddish 
B)  reddish, gray 
C)  white, black 
D)  white, reddish 
A)  black, reddish 
B)  reddish, gray 
C)  white, black 
D)  white, reddish

Question 20

With stainless steel, it is desirable to take the time and necessary precautions to make welds that are no darker than the color ____________________.

Accepted Answer

The answer of With stainless steel, it is desirable to...

Exam 17: Gas Tungsten Arc Welding of Plate

A thick piece of metal that is used to absorb heat is also called a(n) ____________________.

Describe how the velocity of the shielding gas and the torch angle affects the protective zone.

What should be done to the end of the filler rod if it becomes oxidized?

Which of the following is true of welding machine settings?

Which of the following is true of tungsten contamination?

The torch may be angled for better visibility, and still have the proper shielding ____________________.

Carbide precipitation is the combining of ____.

With ____, surface tension helps hold the metal in place, giving excellent bead contour.

The greater the contamination of a stainless steel weld, the ____ of the bead after the weld.

In the GTAW process, contamination left on the metal will be deposited in the weld because ____.

During the manufacturing process, sometimes pockets of primarily ____________________ gas become trapped inside low carbon and mild steels.

When tungsten touches the molten weld pool, ____________________ pulls the contamination up onto the hot tungsten.

Which of the following is a reason to use GTA welding?

Mild steel weld coupons can have the welds removed using an OFC torch, but welds on stainless and aluminum coupons will have to be cut out with a(n) ____________________ torch.

With ____, cleanliness is a critical factor.

What can cause porosity (tiny bubbles) to form on some welds on mild steel?

Why would a welder stick the end of the filler rod in the weld pool as the weld is being stopped?

Carbon is the primary alloy in the classification of low carbon and mild steel, and ranges from ____ for mild steel.

An oxide layer on aluminum is ____, while on iron it is ____.

With stainless steel, it is desirable to take the time and necessary precautions to make welds that are no darker than the color ____________________.

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 Equipment, Setup, and Operation

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

An oxide layer on aluminum is , while on iron it is .