The learner will examine the fundamentals of GMAW.

GMAW Fundamentals: Part 1 of 2

Spray transfer requires an argon gas content of at least what percentage?
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

Spray transfer requires an argon gas content of at least what percentage?

Correct Answer

80%

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Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

Spray transfer requires an argon gas content of at least what percentage?

Your Answer

Correct Answer

80%

 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

The three basic metal transfer modes in GMAW are short circuiting, globular transfer, and spray transfer. What would a fourth one be?
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

The three basic metal transfer modes in GMAW are short circuiting, globular transfer, and spray transfer. What would a fourth one be?

Correct Answer

Pulse spray

Explanation:
Pulse spray is much like a spray transfer but it has two levels of current: one constant lower background current and a second pulsing current that goes above the “transition current” to spray. Pulse spray also requires a special pulsing power source.
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Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

The three basic metal transfer modes in GMAW are short circuiting, globular transfer, and spray transfer. What would a fourth one be?

Your Answer

Correct Answer

Pulse spray

Explanation:
Pulse spray is much like a spray transfer but it has two levels of current: one constant lower background current and a second pulsing current that goes above the “transition current” to spray. Pulse spray also requires a special pulsing power source.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

What material thickness is recommended for short circuit transfer?
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

What material thickness is recommended for short circuit transfer?

Correct Answer

Thin

Explanation:
Because of the low voltages and currents (amps) used, thin material is best suited for short circuit transfer.
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Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

What material thickness is recommended for short circuit transfer?

Your Answer

Correct Answer

Thin

Explanation:
Because of the low voltages and currents (amps) used, thin material is best suited for short circuit transfer.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Globular transfer is the least preferred transfer method.
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

Globular transfer is the least preferred transfer method.

Correct Answer

True

Explanation:
Globular transfer is the least preferred transfer method because of the large amounts of spatter created and the possibilities of weld discontinuities.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

Globular transfer is the least preferred transfer method.

Your Answer

Correct Answer

True

Explanation:
Globular transfer is the least preferred transfer method because of the large amounts of spatter created and the possibilities of weld discontinuities.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

What happens when voltage is increased?

Correct Answer

The fusion zone increases and the weld zone flattens

Explanation:
Welding voltage is directly related to the arc length. Increasing the voltage will heat the base material more, producing a wider, flatter bead profile.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

What happens when voltage is increased?

Your Answer

Correct Answer

The fusion zone increases and the weld zone flattens

Explanation:
Welding voltage is directly related to the arc length. Increasing the voltage will heat the base material more, producing a wider, flatter bead profile.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

What happens when voltage is decreased?

Correct Answer

A narrow weld bead with a high crown is produced

 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

What happens when voltage is decreased?

Your Answer

Correct Answer

A narrow weld bead with a high crown is produced

 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

What material can NOT be welded with GMAW?
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

What material can NOT be welded with GMAW?

Correct Answer

Cardboard

Explanation:
Carbon steel, high-strength low-alloy steel, stainless steel, aluminum, copper, titanium, and nickel alloys can be welded with GMAW by choosing the appropriate combination of shielding gases, electrodes, and welding variables.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

What material can NOT be welded with GMAW?

Your Answer

Correct Answer

Cardboard

Explanation:
Carbon steel, high-strength low-alloy steel, stainless steel, aluminum, copper, titanium, and nickel alloys can be welded with GMAW by choosing the appropriate combination of shielding gases, electrodes, and welding variables.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

What two settings dictate the mode of transfer you are in?

Correct Answer

Wire feed speed and voltage

 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

What two settings dictate the mode of transfer you are in?

Your Answer

Correct Answer

Wire feed speed and voltage

 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

How many times does the electrode contact the material when welding in spray transfer?
Question Image
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

How many times does the electrode contact the material when welding in spray transfer?
question image

Correct Answer

One

Explanation:
Spray transfer is defined as an open arc (always on). Droplets form and detach across the arc at a rate of hundreds per second and therefore only contact the material once at the arc start.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

How many times does the electrode contact the material when welding in spray transfer?
question image

Your Answer

Correct Answer

One

Explanation:
Spray transfer is defined as an open arc (always on). Droplets form and detach across the arc at a rate of hundreds per second and therefore only contact the material once at the arc start.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

What is another abbreviation for GMAW ?
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

What is another abbreviation for GMAW ?

Correct Answer

MIG

Explanation:
MIG stands for Metal Inert Gas.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

What is another abbreviation for GMAW ?

Your Answer

Correct Answer

MIG

Explanation:
MIG stands for Metal Inert Gas.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

How many short circuits occur per second while welding in short circuit transfer?
Question Image
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

How many short circuits occur per second while welding in short circuit transfer?
question image

Correct Answer

20-250

Explanation:
"Short circuit" is defined as an arc-on/arc-off weld cycle.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

How many short circuits occur per second while welding in short circuit transfer?
question image

Your Answer

Correct Answer

20-250

Explanation:
"Short circuit" is defined as an arc-on/arc-off weld cycle.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

What does the abbreviation GMAW stand for?
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

What does the abbreviation GMAW stand for?

Correct Answer

Gas Metal Arc Welding

Explanation:
Gas metal arc welding is a welding process that uses an arc between a continuous filler metal electrode and the weld pool.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

What does the abbreviation GMAW stand for?

Your Answer

Correct Answer

Gas Metal Arc Welding

Explanation:
Gas metal arc welding is a welding process that uses an arc between a continuous filler metal electrode and the weld pool.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Increasing wire feed speed will increase all except what?
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

Increasing wire feed speed will increase all except what?

Correct Answer

Quality

Explanation:
Welding amperage (current) varies with the wire feed speed setting if no other variables are changed. Increasing the current will increase the heat on the wire, producing greater penetration.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

Increasing wire feed speed will increase all except what?

Your Answer

Correct Answer

Quality

Explanation:
Welding amperage (current) varies with the wire feed speed setting if no other variables are changed. Increasing the current will increase the heat on the wire, producing greater penetration.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Spray transfer requires high voltages and high WFS. What positions and thickness of material is spray transfer best suited for?
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

Spray transfer requires high voltages and high WFS. What positions and thickness of material is spray transfer best suited for?

Correct Answer

Flat and horizontal positions using thicker materials

Explanation:
Because of surface tension and gravity, spray transfer is not suited for overhead or vertical positions. And because of the high voltages and WFS, thin materials are not recommended.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

Spray transfer requires high voltages and high WFS. What positions and thickness of material is spray transfer best suited for?

Your Answer

Correct Answer

Flat and horizontal positions using thicker materials

Explanation:
Because of surface tension and gravity, spray transfer is not suited for overhead or vertical positions. And because of the high voltages and WFS, thin materials are not recommended.
 Next Question
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Buried arc is an offshoot of short circuit. What makes buried arc different from short circuit?
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Correct!

Buried arc is an offshoot of short circuit. What makes buried arc different from short circuit?

Correct Answer

Excessive wire feed speeds (WFS)

Explanation:
Buried arc creates short circuits below the surface of the material.
 Finish
Question 1 of 10

GMAW Fundamentals: Part 1 of 2

Incorrect

Buried arc is an offshoot of short circuit. What makes buried arc different from short circuit?

Your Answer

Correct Answer

Excessive wire feed speeds (WFS)

Explanation:
Buried arc creates short circuits below the surface of the material.
 Finish
Question 1 of 10
GMAW Fundamentals: Part 1 of 2

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Published
11/5/2013
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11/5/2013
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GMAW Fundamentals: Part 1 of 2 by Fox Valley Technical College is licensed under a Creative Commons Attribution 3.0 Unported License.