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?

## Correct!

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

Next Question

## Incorrect

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

Next Question

## 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?

## Correct!

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

### 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

## Incorrect

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

### 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

## GMAW Fundamentals: Part 1 of 2

What material thickness is recommended for short circuit transfer?

## Correct!

What material thickness is recommended for short circuit transfer?

### Thin

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

## Incorrect

What material thickness is recommended for short circuit transfer?

### Thin

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

## GMAW Fundamentals: Part 1 of 2

Globular transfer is the least preferred transfer method.

## Correct!

Globular transfer is the least preferred transfer method.

### 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

## Incorrect

Globular transfer is the least preferred transfer method.

### 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

## GMAW Fundamentals: Part 1 of 2

What happens when voltage is increased?

## Correct!

What happens when voltage is increased?

### 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

## Incorrect

What happens when voltage is increased?

### 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

## GMAW Fundamentals: Part 1 of 2

What happens when voltage is decreased?

## Correct!

What happens when voltage is decreased?

Next Question

## Incorrect

What happens when voltage is decreased?

Next Question

## GMAW Fundamentals: Part 1 of 2

What material can NOT be welded with GMAW?

## Correct!

What material can NOT be welded with GMAW?

### 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

## Incorrect

What material can NOT be welded with GMAW?

### 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

## GMAW Fundamentals: Part 1 of 2

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

## Correct!

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

Next Question

## Incorrect

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

Next Question

## GMAW Fundamentals: Part 1 of 2

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

## Correct!

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

### 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

## Incorrect

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

### 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

## GMAW Fundamentals: Part 1 of 2

What is another abbreviation for GMAW ?

## Correct!

What is another abbreviation for GMAW ?

### MIG

Explanation:
MIG stands for Metal Inert Gas.
Next Question

## Incorrect

What is another abbreviation for GMAW ?

### MIG

Explanation:
MIG stands for Metal Inert Gas.
Next Question

## GMAW Fundamentals: Part 1 of 2

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

## Correct!

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

### 20-250

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

## Incorrect

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

### 20-250

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

## GMAW Fundamentals: Part 1 of 2

What does the abbreviation GMAW stand for?

## Correct!

What does the abbreviation GMAW stand for?

### 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

## Incorrect

What does the abbreviation GMAW stand for?

### 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

## GMAW Fundamentals: Part 1 of 2

Increasing wire feed speed will increase all except what?

## Correct!

Increasing wire feed speed will increase all except what?

### 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

## Incorrect

Increasing wire feed speed will increase all except what?

### 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

## 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?

## Correct!

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

### 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

## Incorrect

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

### 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

## GMAW Fundamentals: Part 1 of 2

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

## Correct!

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

### Excessive wire feed speeds (WFS)

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

## Incorrect

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

### 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

# Score

You have answered 5 of 10 questions correctly.

50%

Author
Published
11/5/2013
Last Updated
11/5/2013
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