Welding And Cutting Steel Program 1

Front 1

GMAW & MIG stand for what?

Back 1

Gas metal arc welding & metal inert gas

Front 2

Computers or other sensitive electronic parts that are within __________ of the weld site should be removed.

Back 2

300mm (12")

Front 3

Pressure is also known as:

Back 3

Voltage

Front 4

The more voltage, the faster the __________.

Back 4

Electrons

Front 5

The volume is also known as:

Back 5

Current

Front 6

Current is also known as:

Back 6

Amperage

Front 7

__________ is the limit of the flow of electrons. This also is converted to heat energy.

Back 7

Resistance

Front 8

On MIG welded, if the voltage is increased, so is the _________.

Back 8

Heat

Front 9

The wire feed rate on a MIG welder also sets the_________. The faster the wire feed, the higher the __________.

Back 9

Current

Front 10

__________ is when the electrode is positive and the work piece is negative. This is also used most often for collision repairs.

Back 10

Reverse polarity

Hint 10

Also known as DC reverse

Front 11

What type of welding is recommended for all positions when welding with flux-cored wire?

Back 11

Straight polarity

Front 12

What is the preferred method when using very thin welding wire along with lower current and voltage.

Back 12

Short-circuit transfer

Front 13

Collision repair MIG welders generally have one amp for every __________ of metal thickness.

Back 13

.025mm (.001")

Front 14

How many minutes or of 10 a welding machine can safely operate continuously at a rated amperage is known as what?

Back 14

Duty cycle

Hint 14

This is listed as a percentage.

Front 15

The electrode wire recommended for collision repair uses what code from the American Welding Society (AWS)?

Back 15

ER70S-6

Front 16

Flux-cored wire is not recommended for steels thinner than _____?

Back 16

18 gauge

Front 17

Electrode diameter is selected based on what?

Back 17

Material thickness and amperage requirements

Front 18

________ wire is recommended when welding between 30-90 amps.

Back 18

0.6mm (.023")

Front 19

________ wire is recommended when welding between 40-145 amps.

Back 19

0.8mm (.030")

Front 20

________ wire is recommended when welding between 50-180 amps.

Back 20

0.9mm (.035")

Front 21

Most collision repairs use a mix of ___/___ shielding gas.

Back 21

75% argon/25% CO2

Front 22

For collision repair, welding flow meters are generally set to ________.

Back 22

25-30 cfh

Front 23

________ transfers current to the electrode wire, and is usually made of copper or copper alloy.

Back 23

Contact tip

Front 24

Any surface that is going to be welded must be cleaned, but __________ should not be removed.

Back 24

Galvanized coatings

Front 25

Corroding zinc forms zinc oxide which protects this Steel. This is called __________.

Back 25

Sacrificial corrosion

Front 26

The __________ technique is when the welding gun is pointed at and dragged away from the weld.

Back 26

Pull

Front 27

The ________ technique is when the welding gun is pointed and pushed away from the weld.

Back 27

Push

Front 28

Both the push and pull technique positions the welding gun at what angle to the workpiece?

Back 28

70°

Front 29

When using 0.6 mm (.023") wire, the stick out should be __________.

Back 29

6-13 mm (1/4-1/2")

Front 30

If stick out is too short, penetration will __________. If it is too long, penetration will __________.

Back 30

Increase; decrease

Front 31

When welding thin gauge metal in the vertical position, it is usually easiest if the welding gun is angled:

Back 31

Upward and pulled down

Front 32

Welding techniques used to manage heat buildup include making:

Back 32

Stitch or skip welds

Front 33

A __________ weld is made by starting and stopping briefly between welds to allow some cooling.

Back 33

Stitch

Front 34

A __________ weld is made by making __________ long welds in one direction at random locations along the joint and then filling the spaces in, making a continuous weld, or by starting from the middle and making a short weld to the outside in both directions.

Back 34

Skip; 13-19 mm (1/2-3/4")

Front 35

What is the number one issue, for collision repair, in welds that are generally caused by lack of shielding gas?

Back 35

Porosity

Front 36

Gas metal arc welding (GMAW) is a wire-feed type of __________ welding.

Back 36

Fusion

Front 37

Advantages of GMAW include a small __________ zone around the weld.

Back 37

Heat affected

Front 38

GMAW machines are plugged into ______ power source power and converted to ______.

Back 38

AC/DC

Hint 38

Also a well-known rock band

Front 39

What are the three types of transfer methods?

Back 39

Spray arc, globular , Short Circuit

Front 40

Plug weld holes should be the size recommended by the vehicle maker or _________ if no recommendation exists?

Back 40

8 mm (5/16")

Front 41

To make a plug weld, the welding gun should be at a _______ angle to base metal.

Back 41

90°