P6 - Semi Automatic And Automatic Welding

Front 1

Gmaw normally uses what kind of current

Back 1

Direct current electrode positive

Front 2

When using DCEP power source is a _________ machine and the wire feed unit is a _________ type

Back 2

Constant voltage

Constant speed

Front 3

In GMAW-P, the welding amperage levels rise and fall at an extremely fast, regular rate, called

Back 3

Pulses per second

Front 4

What does adaptive synergic mean

Back 4

One control with the ability to adapt to changing arc conditions

Front 5

What does having a higher current density mean

Back 5

It concentrates more current at one point

Front 6

Gmaw can be used to weld virtually All Metals except those that cannot be drawn into wire. What metal is it

Back 6

Cast iron, could not be formed into wire because it has such low malleability

Front 7

When using GMAW-P what kind of gas do you want to use

Back 7

Operate more efficiently using a 75% or higher argon gas mix

Front 8

FCAW uses what kind of filler wire

Back 8

Tubular electrode wire with powdered flux inside

Front 9

Fcaw is especially well-suited for welding what kind of metals and what kind of applications

Back 9

Low carbon structural Steals and low alloy and stainless steels. It's also widely used for hardfacing applications

Front 10

With fcaw deep penetration reduces the need for

Back 10

Edge preparation

Front 11

The main disadvantage fcaw is it limited application. What kind of metals can be welded

Back 11

Low and medium carbon Steels, some low alloy Steels and a limited number of stainless steel

Front 12

In metal cored arc welding what kind of filler metal wire is used

Back 12

Tubular that has no fluxing ingredients inside instead the wires filled with powdered metal

Front 13

When using metal cored arc welding what kind of gas do you usually use

Back 13

Argon rich shielding gases

Front 14

One of the main advantages of metal cored arc welding is its excellent __________. Lack of ________ or ________ _________ is rare

Back 14

Penetration

Fusion

Cold lap

Front 15

One main advantage of the fcaw process over the gmaw process is

Back 15

Fast deposition rate

Front 16

Which process has the highest deposition efficiency

Back 16

SAW

Front 17

The addition of silicon to MCAW filler metal wire helps to reduce the possibility of

Back 17

Porosity

Front 18

The recommended welding current for saw is

Back 18

Constant voltage direct current electrode positive

Front 19

Which welding current is used for saw when Arc blow is a problem

Back 19

Constant voltage alternating current

Front 20

The sliding, scraping type of where the removes metal by gouging or grinding is called

Back 20

Abrasion

Front 21

Hounding, battering type of where that splits, breaks, chips, mushrooms or otherwise deforms the metal surface is called

Back 21

Impact wear

Front 22

Which hard surfacing material is the most abrasion resistant

Back 22

Tungsten carbide

Front 23

To reduce falling, cracking in Distortion you must control

Back 23

The cooling rate

Front 24

What refers to the breaking away of metal particles from the base metal or underlying hard surfacing layers

Back 24

Spalling

Front 25

An effective way to slow the cooling rate is by

Back 25

Pre-heating

Front 26

A method of relieving internal stresses, especially in large Parts, is by each layer during Cooling

Back 26

Peening

Front 27

One way to control dilution is to

Back 27

Use low current settings

Front 28

What hard surfacing pattern is suited to resisting impact wear

Back 28

Dot pattern

Front 29

What hard surfacing pattern protects the base metal by trapping dirt and sand

Back 29

Waffle pattern

Front 30

Solid build up is often used on

Back 30

Latch pins

Front 31

What hard surfacing material combines good impact resistance with good abrasion resistance and is work hardable

Back 31

Austenitic manganese Steel

Front 32

What hard surfacing material is especially good at resisting corrosive wear and is good choice for lime kiln augurs

Back 32

Non-ferrous chromium carbide

Front 33

Which mode of metal transfer is most often used in gmaw aluminum

Back 33

spray transfer

Front 34

When metal arc welding aluminum, you always use what kind of technique

Back 34

The pushing technique

Front 35

When you gas metal Arc weld aluminum in the vertical position, your direction of travel should be

Back 35

Uphill

Front 36

Which current is used for gmaw on aluminum

Back 36

Direct current electrode positive

Front 37

On thick aluminum plate, which shielding gas mixtures are often used with gmaw

Back 37

Argon and helium

Front 38

Hot shortness a particular problem with aluminum is defined as

Back 38

Loss of tensile strength as metal approaches melting temperature

Front 39

Aluminum filler wire for gmaw should be stored in

Back 39

A clean, dry area

Front 40

The problem of cracking in holes resulting from pot shortness can be averted by

Back 40

Providing support for the weld puddle

Front 41

Why is the pushing technique always used for gmaw on aluminum

Back 41

To ensure the shielding gas adequately protects the weld puddle