Question 1

GMA welding machines have ____ duty cycle.

Accepted Answer

A)  20 percent 
B)  60 percent 
C)  80 percent 
D)  100 percent 
A)  20 percent 
B)  60 percent 
C)  80 percent 
D)  100 percent

Question 2

In the pulsed-arc metal transfer current cycle, ____ refers to the surging electrical current passing through the transformer like a wave on water.

Accepted Answer

A)  overshoot 
B)  ramp up 
C)  high pulse current 
D)  pulse width 
A)  overshoot 
B)  ramp up 
C)  high pulse current 
D)  pulse width

Question 3

Which of the following is true of GMA spot welding?

Accepted Answer

A)  Welds can only be made in thin materials. 
B)  The weld cannot be made if only one side of the materials to be welded is accessible. 
C)  The weld cannot be made when there is paint on the interfacing surfaces. 
D)  The burning back of the thin material allows the thicker metal to be melted. 
A)  Welds can only be made in thin materials. 
B)  The weld cannot be made if only one side of the materials to be welded is accessible. 
C)  The weld cannot be made when there is paint on the interfacing surfaces. 
D)  The burning back of the thin material allows the thicker metal to be melted.

Question 4

​What gas is added to argon for the axial spray transfer method transfer?

Accepted Answer

A)  ​O2 (Oxygen) 
B)  ​CO2 (Carbon dioxide) 
C)  ​He (Helium) 
D)  ​N (Nitrogen) 
A)  ​O2 (Oxygen) 
B)  ​CO2 (Carbon dioxide) 
C)  ​He (Helium) 
D)  ​N (Nitrogen)

Question 5

​Modulated current metal transfer can _______________________.

Accepted Answer

A)  ​reduce spatter and fumes associated with conventional GMA welding 
B)  ​use 100% CO2 for all of the weld it makes 
C)  ​only use argon and helium as shielding gasses due to the higher deposition rates 
D)  ​be used for axial spray or short-circuiting metal transfer methods 
A)  ​reduce spatter and fumes associated with conventional GMA welding 
B)  ​use 100% CO2 for all of the weld it makes 
C)  ​only use argon and helium as shielding gasses due to the higher deposition rates 
D)  ​be used for axial spray or short-circuiting metal transfer methods

Question 6

​The rate at which the current builds up the magnetic field and the resulting welding current is called ________.

Accepted Answer

A)  ​slope 
B)  ​reactance time 
C)  ​magnetic decay and response time 
D)  ​response cycles 
A)  ​slope 
B)  ​reactance time 
C)  ​magnetic decay and response time 
D)  ​response cycles

Question 7

The ____________________ is the distance from the contact tube to the arc measured along the wire.

Accepted Answer

electrode

Question 8

​Which metal transfer method occurs as the result of direct contact of the electrode to the molten weld pool?

Accepted Answer

A)  ​Short-circuiting transfer 
B)  ​Axial spray transfer 
C)  ​Globular transfer 
D)  ​Buried-arc transfer 
A)  ​Short-circuiting transfer 
B)  ​Axial spray transfer 
C)  ​Globular transfer 
D)  ​Buried-arc transfer

Question 9

​GMAW-P welds made on most metals other than steel use __________shielding gas.

Accepted Answer

A)  ​2% oxygen + 98% argon 
B)  ​100% argon 
C)  ​25% helium + 75% argon 
D)  ​25%CO2 + 75% argon 
A)  ​2% oxygen + 98% argon 
B)  ​100% argon 
C)  ​25% helium + 75% argon 
D)  ​25%CO2 + 75% argon

Question 10

​What changes to the welding machine are required to change between short-circuiting and axial spray or between axial spray and buried arc transfer methods?

Accepted Answer

A)  ​Change the shielding gas from Ar to 100% CO2 or He to Ar+O2. 
B)  ​Make the changes in the welding machine's voltage and amperage settings. 
C)  ​Increase the voltage. 
D)  ​Increase the amperage. 
A)  ​Change the shielding gas from Ar to 100% CO2 or He to Ar+O2. 
B)  ​Make the changes in the welding machine's voltage and amperage settings. 
C)  ​Increase the voltage. 
D)  ​Increase the amperage.

Exam 10: Gas Metal Arc Welding Equipment, Setup, and Operation

GMA welding machines have ____ duty cycle.

In the pulsed-arc metal transfer current cycle, ____ refers to the surging electrical current passing through the transformer like a wave on water.

Which of the following is true of GMA spot welding?

​What gas is added to argon for the axial spray transfer method transfer?

​Modulated current metal transfer can _______________________.

​The rate at which the current builds up the magnetic field and the resulting welding current is called ________.

The ____________________ is the distance from the contact tube to the arc measured along the wire.

​Which metal transfer method occurs as the result of direct contact of the electrode to the molten weld pool?

​GMAW-P welds made on most metals other than steel use __________shielding gas.

​What changes to the welding machine are required to change between short-circuiting and axial spray or between axial spray and buried arc transfer methods?

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

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

What gas is added to argon for the axial spray transfer method transfer?

Modulated current metal transfer can _______________________.

The rate at which the current builds up the magnetic field and the resulting welding current is called ________.

Which metal transfer method occurs as the result of direct contact of the electrode to the molten weld pool?

GMAW-P welds made on most metals other than steel use __________shielding gas.

What changes to the welding machine are required to change between short-circuiting and axial spray or between axial spray and buried arc transfer methods?