Question 1

Explain how high gas flow rates can lead to contamination.

Accepted Answer

High gas flow rates waste shielding gases and may lead to contamination.The contamination comes from turbulence in the gas at high flow rates.Air is drawn into the gas envelope by the venturi effect around the edge of the nozzle.Also, the air can be drawn in under the nozzle if the torch is held at too sharp an angle to the metal.

Question 2

When used as pure gases for welding ferrous metals, ____ may produce an erratic arc action, promote undercutting, and result in other flaws.

Accepted Answer

A)  oxygen 
B)  carbon dioxide 
C)  active gases 
D)  argon and helium 
A)  oxygen 
B)  carbon dioxide 
C)  active gases 
D)  argon and helium D

Question 3

Because of the constant-potential power supply, the welding current will change as the distance between the ____________________ and the work changes.

Accepted Answer

contact tube

Question 4

Filler metals and fluxes usually have ____________________ added to them so that the adverse effects of the mill scale are reduced or eliminated.

Accepted Answer

The answer of Filler metals and fluxes usually have ____________________...

Question 5

Mixtures of argon with less than ____ percent carbon dioxide may not have enough arc voltage to give desired results.

Accepted Answer

A)  five 
B)  ten 
C)  thirty 
D)  fifty 
A)  five 
B)  ten 
C)  thirty 
D)  fifty

Question 6

The correct flow rate of a shielding gas can be set by ____.

Accepted Answer

A)  checking the pressure of the gas 
B)  multiplying the nozzle size by the amperage 
C)  checking welding guides 
D)  checking the density of the gas 
A)  checking the pressure of the gas 
B)  multiplying the nozzle size by the amperage 
C)  checking welding guides 
D)  checking the density of the gas

Question 7

​A ________ must be chained securely in place before the valve protection cap is removed.

Accepted Answer

A)  ​Shielding gas cylinder 
B)  ​Flowmeter regulator 
C)  ​Cooling water supply hose 
D)  ​Welding power cable 
A)  ​Shielding gas cylinder 
B)  ​Flowmeter regulator 
C)  ​Cooling water supply hose 
D)  ​Welding power cable

Question 8

In GMA welding, the voltage is set ____ and the amperage is set ____.

Accepted Answer

A)  on the welder, on the welder 
B)  by changing the wire-feed speed, on the welder 
C)  on the welder, by changing the wire-feed speed 
D)  by changing the wire-feed speed, by changing the wire-feed speed 
A)  on the welder, on the welder 
B)  by changing the wire-feed speed, on the welder 
C)  on the welder, by changing the wire-feed speed 
D)  by changing the wire-feed speed, by changing the wire-feed speed

Question 9

​When CO2 is being used as a shielding gas and the voltage is set near the maximum, ________.

Accepted Answer

A)  ​excessive spatter may occur 
B)  ​the welding arc may become too short to control arc blow 
C)  ​the electrode wire may begin to feed erratically 
D)  ​the weld penetration will burn through the plate 
A)  ​excessive spatter may occur 
B)  ​the welding arc may become too short to control arc blow 
C)  ​the electrode wire may begin to feed erratically 
D)  ​the weld penetration will burn through the plate

Question 10

​Is there any benefit to the mill scale that can be found on almost all hot rolled steel?

Accepted Answer

A)  ​It can help the deoxidizers in the filler metal to react with the weld to make a better weld. 
B)  ​It can help to prevent rust from forming. 
C)  ​It acts like a dam along the sides of the weld pool to keep the weld bead from getting too wide. 
D)  ​No it has no benefit. 
A)  ​It can help the deoxidizers in the filler metal to react with the weld to make a better weld. 
B)  ​It can help to prevent rust from forming. 
C)  ​It acts like a dam along the sides of the weld pool to keep the weld bead from getting too wide. 
D)  ​No it has no benefit.

Question 11

The ____________________ refers to the angle between the GMA welding gun and the work as it relates to the direction of travel.

Accepted Answer

The answer of The ____________________ refers to the angle between...

Question 12

A ____ gap may require ____.

Accepted Answer

A)  narrow, more penetration 
B)  narrow, less penetration 
C)  wide, more penetration 
D)  narrow, forehand welding 
A)  narrow, more penetration 
B)  narrow, less penetration 
C)  wide, more penetration 
D)  narrow, forehand welding

Question 13

Describe how to keep the weld bead straight and uniform when visibility is limited.

Accepted Answer

Even with limited visibility, it is poss

Question 14

____________________ is the chief determinant of how effective a gas is for arc shielding.

Accepted Answer

The answer of ____________________ is the chief determinant of how...

Question 15

____________________ is a thin layer of dark gray or black iron oxide formed during the rolling process.

Accepted Answer

The answer of ____________________ is a thin layer of dark...

Question 16

At any one voltage setting, ____ amperage is required to melt the wire the ____ it is fed.

Accepted Answer

A)  more, faster 
B)  less, faster 
C)  more, slower 
D)  the same, faster 
A)  more, faster 
B)  less, faster 
C)  more, slower 
D)  the same, faster

Question 17

Explain what happens when spatter falls onto the shielding gas nozzle, and how this can be minimized.

Accepted Answer

Much of the spatter created during overh

Question 18

The major advantages of the vertical down position technique are ____.

Accepted Answer

A)  speed and deep penetration 
B)  speed, shallow penetration, and good bead appearance 
C)  less skill is required to make sound welds 
D)  lack of fusion and overlap 
A)  speed and deep penetration 
B)  speed, shallow penetration, and good bead appearance 
C)  less skill is required to make sound welds 
D)  lack of fusion and overlap

Question 19

Adding oxygen or carbon dioxide to an inert gas causes the shielding gas to become ____, which may cause ____ in some ferrous materials.

Accepted Answer

A)  inert, oxidizing 
B)  oxidizing, spatter 
C)  oxidizing, porosity 
D)  inert, porosity 
A)  inert, oxidizing 
B)  oxidizing, spatter 
C)  oxidizing, porosity 
D)  inert, porosity

Question 20

Which of the following is true of short-circuiting arc metal transfer in the overhead position?

Accepted Answer

A)  It has a large molten weld pool size. 
B)  It has less molten weld pool sag. 
C)  It has more undercut and fewer icicles. 
D)  It has less efficient metal transfer and more spatter. 
A)  It has a large molten weld pool size. 
B)  It has less molten weld pool sag. 
C)  It has more undercut and fewer icicles. 
D)  It has less efficient metal transfer and more spatter.

Exam 11: Gas Metal Arc Welding

Explain how high gas flow rates can lead to contamination.

When used as pure gases for welding ferrous metals, ____ may produce an erratic arc action, promote undercutting, and result in other flaws.

Because of the constant-potential power supply, the welding current will change as the distance between the ____________________ and the work changes.

Filler metals and fluxes usually have ____________________ added to them so that the adverse effects of the mill scale are reduced or eliminated.

Mixtures of argon with less than ____ percent carbon dioxide may not have enough arc voltage to give desired results.

The correct flow rate of a shielding gas can be set by ____.

​A ________ must be chained securely in place before the valve protection cap is removed.

In GMA welding, the voltage is set ____ and the amperage is set ____.

​When CO2 is being used as a shielding gas and the voltage is set near the maximum, ________.

​Is there any benefit to the mill scale that can be found on almost all hot rolled steel?

The ____________________ refers to the angle between the GMA welding gun and the work as it relates to the direction of travel.

A ____ gap may require ____.

Describe how to keep the weld bead straight and uniform when visibility is limited.

____________________ is the chief determinant of how effective a gas is for arc shielding.

____________________ is a thin layer of dark gray or black iron oxide formed during the rolling process.

At any one voltage setting, ____ amperage is required to melt the wire the ____ it is fed.

Explain what happens when spatter falls onto the shielding gas nozzle, and how this can be minimized.

The major advantages of the vertical down position technique are ____.

Adding oxygen or carbon dioxide to an inert gas causes the shielding gas to become ____, which may cause ____ in some ferrous materials.

Which of the following is true of short-circuiting arc metal transfer in the overhead position?

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

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, Operation, and Filler Metals

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

A ________ must be chained securely in place before the valve protection cap is removed.

In GMA welding, the voltage is set and the amperage is set .

When CO2 is being used as a shielding gas and the voltage is set near the maximum, ________.

Is there any benefit to the mill scale that can be found on almost all hot rolled steel?

A gap may require .

At any one voltage setting, amperage is required to melt the wire the it is fed.

Adding oxygen or carbon dioxide to an inert gas causes the shielding gas to become , which may cause in some ferrous materials.