Deck 11: Gas Metal Arc Welding Equipment and Materials

Question 1

The speed of the motor used in wire feed units can be continuously adjusted over the desired wire feed speed range.

Answer 1

True

Question 2

The steel, copper, brass, or plastic wire guides are a simple component of the feeder system.

Answer 2

True

Question 3

The most commonly used conductor tubes have a ____ angle.

A) 15°
B) 30°
C) 45°
D) 60°

Answer 3

C

Question 4

Axial spray arc provides the highest metal transfer rate and that means higher productivity.

Question 5

GMAW-S can be used with a wide range of electrode diameters and shielding gases.

Question 6

The ____ wire feed system has two motors, one located at each end.

A) spool gun type
B) push-pull-type
C) push-type
D) pull-type

Question 7

Pressing the gun switch to start the wire feeder is called tricking the gun.

Question 8

On ____, if the tube is not vertical, the reading is not accurate.

A) gas flowmeters
B) air flowmeters
C) ball-type flowmeters
D) aluminum flowmeters

Question 9

GMA welding can easily be used in all positions because the weld pool is small and the ____.

A) metal is molten for a very short time
B) wire is not energized
C) filler metal is automatically fed
D) volts and amperes are mutually increased

Question 10

The gas diffuser transfers the current to the ____.

A) copper cable
B) connector block
C) contact tube
D) welding gun

Question 11

Globular transfer is generally used on thin materials and at a very low____.

A) voltage range
B) oxide level
C) pressure level
D) current range

Question 12

The contact tube may get as hot as 300°C when you are welding with an air-cooled GMAW torch.

Question 13

The typical welder learns to use GMAW equipment after many hours of instruction and practice.

Question 14

For the feed rollers to properly grip and feed the filler metal, they must have proper tension applied.

Question 15

Inert gases are very soluble in molten metal.

Question 16

In the ____ system, the small diameter electrode wire must have enough stiffness to be pushed through the conduit without kinking.

A) pull-type
B) push-type
C) push-pull-type
D) spool gun type

Question 17

The modes of metal transfer are short-circuit transfer, axial spray transfer, globular transfer, and pulsed-arc transfer ____.

A) (GMAW)
B) (GMAW-P)
C) (GMAW-S)
D) (GMAW-PAT)

Question 18

In ____ systems, a small motor is located in the gun to pull the wire through the conduit.

A) spool gun type
B) push-type
C) push-pull-type
D) pull-type

Question 19

The chief drawback in the use of ____ is the less-steady-arc characteristics and a considerable increase in weld spatter.

A) carbon dioxide
B) argon
C) oxygen
D) helium

Question 20

A contact tube can be removed and cleaned with a set of oxyacetylene torch tip cleaners to extend the useful life of the contact tube except for when the material is aluminum wire.

Question 21

There are four major types of wire feed systems. They are push-type, pull-type, push-pull-type, and ____________________.

Question 22

The ____________________ is a flexible hollow tube through which the wire is fed from the wire feed unit to the gun.

Question 23

Often the GMA axial spray metal transfer process is referred to simply as ____________________.

Question 24

The most commonly used gases for ferrous metals are CO₂, argon with 2 to 5% oxygen added, and ____________________ with 25% CO₂ added.

Question 25

The terms voltage, volts, and ____________________ can all be interchanged when referring to electrical pressure.