Question 1

Explain why the power supply is critical in the short-circuiting transfer process.

Accepted Answer

The answer of Explain why the power supply is critical...

Question 2

Which of the following is true of backhand welding?

Accepted Answer

A)  It has good joint visibility and makes welds with less joint penetration. 
B)  It works well on vertical up and overhead welds. 
C)  It has good bead visibility and makes welds with deeper joint penetration. 
D)  It has a good balance between penetration and reinforcement and is used on automated welding.

Question 3

​GMAW power supplies are ____ type machines.

Accepted Answer

A)  ​constant-current and constant-voltage 
B)  ​constant-voltage and constant-potential 
C)  ​drooping arc voltage and constant-current 
D)  ​constant-current and constant-potential

Question 4

​The ________ current of the spray mode produces good penetration and fusion, and the ____ current allows the weld pool to cool and contract slightly.

Accepted Answer

A)  ​DCEN, DCEP 
B)  ​DCEP, DCEN 
C)  ​AC DCEP 
D)  ​high, low

Question 5

In the ____ feed system, the electrode must have enough strength to be pushed through the conduit without kinking.

Accepted Answer

A)  push-type 
B)  pull-type 
C)  push-pull-type 
D)  linear

Question 6

MAG is short for ____.

Accepted Answer

A)  metal arc gas welding 
B)  metal active gas welding 
C)  metal action gas welding 
D)  metal anion gas welding

Question 7

Which of the following is true of perpendicular welding technique?

Accepted Answer

A)  It has a good balance between penetration and reinforcement and is used on automated welding. 
B)  It has good bead visibility and makes welds with deeper joint penetration. 
C)  It has good joint visibility and makes welds with less joint penetration. 
D)  It works well on vertical up and overhead welds.

Question 8

​An advantage of the ____ feed system is that the bulky system of gears is eliminated.

Accepted Answer

A)  ​linear 
B)  ​pull-type 
C)  ​push-type 
D)  ​push-pull-type

Question 9

Which of the following is true of pull-type feed systems?

Accepted Answer

A)  Feed motors are located at both ends of the electrode conduit. 
B)  The gun is heavier and more difficult to use. 
C)  Rethreading the wire takes little time. 
D)  The feed system uses a synchronized system.

Question 10

In the pulsed-arc metal transfer current cycle, ____ is the peak current that flows across the arc during the high current pulse.

Accepted Answer

A)  ramp up 
B)  high pulse current 
C)  high current time 
D)  step-off current

Question 11

As much as ____ can be added to the argon to increase the power in the arc without affecting the desirable qualities of the spray mode.

Accepted Answer

A)  10% oxygen 
B)  20% nitrogen 
C)  50% carbon dioxide 
D)  80% helium

Question 12

In the pulsed-arc metal transfer current cycle, ____ is a function of the time it takes the magnetic field in the transformer to collapse once the coil is de-energized.

Accepted Answer

A)  step-off current 
B)  high current time 
C)  ramp up 
D)  ramp down

Question 13

Explain how to measure the wire-feed ipm.

Accepted Answer

The answer of Explain how to measure the wire-feed ipm....

Question 14

​When the GMAW-S process is properly tuned, what is the approximate rate of its cycling?

Accepted Answer

A)  ​overshoot 
B)  ​ramp up 
C)  ​high pulse current 
D)  ​20 to 200 times per second

Question 15

The ____________________ rate, measured in inches per minute or pounds per hour, is the rate at which the arc consumes the wire.

Accepted Answer

The answer of The ____________________ rate, measured in inches per...

Question 16

____________________ transfer can be used on thin materials and at a very low current range.

Accepted Answer

The answer of ____________________ transfer can be used on thin...

Question 17

GMAW is almost free from spatter because it uses a mode of metal transfer called ____________________ metal transfer.

Accepted Answer

The answer of GMAW is almost free from spatter because...

Question 18

​The GMAW-S process does not produce enough heat to make quality welds in sections much thicker than 1/4 in.(6 mm) unless it is used for the root pass on a grooved weld or to fill gaps in joints.

Accepted Answer

A)  ​1/2 in.(13 mm) 
B)  ​5/16in.(8 mm) 
C)  ​1/4 in.(6 mm) 
D)  ​1/8 in.(3 mm)

Question 19

​Which of the following is true of globular transfer?

Accepted Answer

A)  ​It is used more commonly in combination with pulsed-spray transfer. 
B)  ​The arc's real work occurs when the current pulses above the transition current. 
C)  ​There are hundreds of drops per second crossing from the wire to the base metal. 
D)  ​The process requires a current level above the transition current.

Question 20

​In the pulsed-arc metal transfer current cycle, ____ refers to how the electric current in a transformer takes a few milliseconds to build up the magnetic field to full strength once the coil is energized.

Accepted Answer

A)  ​pulse width 
B)  ​ramp down 
C)  ​ramp up 
D)  ​overshoot

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

Explain why the power supply is critical in the short-circuiting transfer process.

Which of the following is true of backhand welding?

GMAW power supplies are ____ type machines.

The ____ current of the spray mode produces good penetration and fusion, and the current allows the weld pool to cool and contract slightly.

In the ____ feed system, the electrode must have enough strength to be pushed through the conduit without kinking.

MAG is short for ____.

Which of the following is true of perpendicular welding technique?

An advantage of the ____ feed system is that the bulky system of gears is eliminated.

Which of the following is true of pull-type feed systems?

In the pulsed-arc metal transfer current cycle, ____ is the peak current that flows across the arc during the high current pulse.

As much as ____ can be added to the argon to increase the power in the arc without affecting the desirable qualities of the spray mode.

In the pulsed-arc metal transfer current cycle, ____ is a function of the time it takes the magnetic field in the transformer to collapse once the coil is de-energized.

Explain how to measure the wire-feed ipm.

When the GMAW-S process is properly tuned, what is the approximate rate of its cycling?

The ____________________ rate, measured in inches per minute or pounds per hour, is the rate at which the arc consumes the wire.

____________________ transfer can be used on thin materials and at a very low current range.

GMAW is almost free from spatter because it uses a mode of metal transfer called ____________________ metal transfer.

The GMAW-S process does not produce enough heat to make quality welds in sections much thicker than 1/4 in.(6 mm) unless it is used for the root pass on a grooved weld or to fill gaps in joints.

Which of the following is true of globular transfer?

In the pulsed-arc metal transfer current cycle, ____ refers to how the electric current in a transformer takes a few milliseconds to build up the magnetic field to full strength once the coil is energized.

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

Explain why the power supply is critical in the short-circuiting transfer process.

Which of the following is true of backhand welding?

​GMAW power supplies are ____ type machines.

​The ________ current of the spray mode produces good penetration and fusion, and the ____ current allows the weld pool to cool and contract slightly.

In the ____ feed system, the electrode must have enough strength to be pushed through the conduit without kinking.

MAG is short for ____.

Which of the following is true of perpendicular welding technique?

​An advantage of the ____ feed system is that the bulky system of gears is eliminated.

Which of the following is true of pull-type feed systems?

In the pulsed-arc metal transfer current cycle, ____ is the peak current that flows across the arc during the high current pulse.

As much as ____ can be added to the argon to increase the power in the arc without affecting the desirable qualities of the spray mode.

In the pulsed-arc metal transfer current cycle, ____ is a function of the time it takes the magnetic field in the transformer to collapse once the coil is de-energized.

Explain how to measure the wire-feed ipm.

​When the GMAW-S process is properly tuned, what is the approximate rate of its cycling?

The ____________________ rate, measured in inches per minute or pounds per hour, is the rate at which the arc consumes the wire.

____________________ transfer can be used on thin materials and at a very low current range.

GMAW is almost free from spatter because it uses a mode of metal transfer called ____________________ metal transfer.

​The GMAW-S process does not produce enough heat to make quality welds in sections much thicker than 1/4 in.(6 mm) unless it is used for the root pass on a grooved weld or to fill gaps in joints.

​Which of the following is true of globular transfer?

​In the pulsed-arc metal transfer current cycle, ____ refers to how the electric current in a transformer takes a few milliseconds to build up the magnetic field to full strength once the coil is energized.

GMAW power supplies are ____ type machines.

The ____ current of the spray mode produces good penetration and fusion, and the current allows the weld pool to cool and contract slightly.

An advantage of the ____ feed system is that the bulky system of gears is eliminated.

When the GMAW-S process is properly tuned, what is the approximate rate of its cycling?

The GMAW-S process does not produce enough heat to make quality welds in sections much thicker than 1/4 in.(6 mm) unless it is used for the root pass on a grooved weld or to fill gaps in joints.

Which of the following is true of globular transfer?

In the pulsed-arc metal transfer current cycle, ____ refers to how the electric current in a transformer takes a few milliseconds to build up the magnetic field to full strength once the coil is energized.