Question 1

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 2

The purpose of the ____ is to provide a steady and reliable supply of wire to the weld.

Accepted Answer

A)  power source 
B)  electrode feeder 
C)  electrode conduit 
D)  welding gun

Question 3

Modulated current metal transfer uses an extremely modified version of _________.

Accepted Answer

The answer of Modulated current metal transfer uses an extremely...

Question 4

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 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

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

Question 7

Explain how to measure the wire-feed ipm.

Accepted Answer

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

Question 8

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 9

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

Question 10

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 11

GMAW-P is a ____________________ system that interlocks the power supply and wire feeder.

Accepted Answer

The answer of GMAW-P is a ____________________ system that interlocks...

Question 12

The rate of voltage decrease as the amperage increases within the working range is known as ____________________.

Accepted Answer

The answer of The rate of voltage decrease as the...

Question 13

In axial spray metal transfer, the shielding gas is usually a mixture of ____.

Accepted Answer

A)  95% to 98% argon and 2% to 5% oxygen 
B)  2% to 5% argon and 95% to 98% oxygen 
C)  50% argon and 50% oxygen 
D)  5% argon and 95% oxygen

Question 14

Which of the following is true of axial spray transfers using high current settings?

Accepted Answer

A)  Higher currents are needed with smaller diameter wires. 
B)  High current aids welding sheet metal because the high heat cuts through sheet metal. 
C)  High current settings may cause the weld to be difficult to control in out-of-position welds. 
D)  The need for higher current removes some restrictions on the process.

Question 15

The modulated current transfer process can be used to make code quality root welds ______.

Accepted Answer

A)  only if the root face is 1/8 in (3 mm) and the root opening is 7/32 in. (2.7 mm) 
B)  when the root face is twice the size of the root opening but less than 5/32 in (4 mm) 
C)  even if the root opening and root face may vary as much as the code might allow 
D)  only in ferrous (steel) alloys

Question 16

The ____________________ rate is the measure of the weld metal deposited.

Accepted Answer

The answer of The ____________________ rate is the measure of...

Question 17

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 18

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 19

Explain the modulated current metal transfer process.

Accepted Answer

The answer of Explain the modulated current metal transfer process....

Question 20

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

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