Week 2

Question 1

Essentially welding is a safe occupation if proper precautionary measures are always ___

Answer 1

Observed

Question 2

To prevent illness due to overexposure of hazardous material from the fume plume you should avoid what

Answer 2

Breathing directly over it

Question 3

The ___ process is an electric arc process that produces a coalescence of metals by heating them with an arc between a continuous filler metal and a work piece, shielding is provided by gas

Answer 3

MIG

Question 4

When using ___ polarity the current flow is from negative electrode to the positive workpiece

Answer 4

DCEN

Question 5

The shielded metal arc welding process is referred to as ___ welding

Answer 5

Stick

Question 6

4 basic welding positions are flat, horizontal, vertical and ___

Answer 6

Overhead

Question 7

The first pass in a multipass butt weld is called the

Answer 7

Root pass

Question 8

One of the inert gas mixes used to MIG weld mild and low alloy steel contains 25% ___ and 75% ___

Answer 8

25% CO2 and 75% argon

Question 9

In TIG welding the tungsten electrode is used to produce a ___ which creates a puddle on the base metal

Answer 9

Arc

Question 10

Tungsten is used because of what 2 important characteristics

Answer 10

High melting point and excellent electrical conductor

Question 11

The current used in TIG welding aluminum is generally

Answer 11

AC

Question 12

Plasma arc cutting is a ___ cutting process which cuts anything that conducts heat and electricity

Answer 12

Thermal

Question 13

What is AWS stand for

Answer 13

American welding society

Question 14

T/F
When welding metal with hazardous coating such as Galvanized, the welder should use mechanical exhaust , ventilation will prevent over exposure

Answer 14

True

Question 15

T/F
When when an electric holder is not in use hang it on a gas cylinder

Answer 15

False

Question 16

T/F
A liquid die penetration kit is a destructive method used

Answer 16

False

Question 17

T/F
A TIG welding torch can only be water cooled

Answer 17

False

Question 18

T/F
Flux core arc welding can be used in either DCEN or DCEP

Answer 18

True

Question 19

T/F
In TIG welding stainless steel the shape of the tungsten is shaped to a pencil point

Answer 19

True

Question 20

T/F
Safety awareness is important in air carbon arc cutting because…

Answer 20

True

Question 21

T/F
Can you cut ferrous and non ferrous materials with a plasma cutter

Answer 21

True

Question 22

T/F
You can weld downhill with 7018

Answer 22

False

Question 23

T/F
GTAW post flow setting is mainly used to cool down a tungsten electrode and protect the weld pool after the welding process has stopped

Answer 23

True

Question 24

Duty cycle is defined as the ratio of __ time to __ time

Answer 24

Arc, total

Question 25

Welders should protect themselves other workers and equipment from the heat, sparks and _____ produced by the arc welder

Answer 25

Ultraviolet rays

Question 26

When compressed gas cylinders empty close the valve and what?

Answer 26

Mark the cylinders empty

Question 27

Always wear eye protection when welding, never look at the arc without proper eye protection, this will prevent injuries in what?

Answer 27

Arc flash

Question 28

The most popular and widely used welding inspection technique is what?

Answer 28

Visual inspection

Question 29

If a welder uses a different welding process or a welding procedure is altered drastically then…

Answer 29

Re qualification is required

Question 30

In a welding shop you should assume that all metal and tool are ___

Answer 30

Hot

Question 31

Before a welder can begin work on any job covered by a welding code, qualification under the code that applies is …

Answer 31

Required

Question 32

In all welding the weld pool must be protected by contamination in the atmosphere, in the welding process this is accomplished by either gases produced by the ______ on or in the electrode as it is consumed or by a shielding ___ into the arc

Answer 32

Coating, gas

Question 33

One of the main functions of the electrode coatings is to ___

Answer 33

All the above

Question 34

The rod angle should be directed so both pieces of metal are getting the same amount. It should be angled in direction of travel ___ to ___ degrees

Answer 34

10 to 15 degrees

Question 35

The separation at the joint between two work pieces is called the ___ opening

Answer 35

Root opening

Question 36

The GMAW process requires a constant voltage power supply and utilizes DC electrode ____

Answer 36

Positive

Question 37

The push method on a wire feeder moves the wire by

Answer 37

Pushing the wire

Question 38

To help with electrical pickup and protect the wire from oxidation, steel wires are coated with

Answer 38

Copper

Question 39

If spatter buildup is not removed from the nozzle in MIG welding it can reduce the ___ shield over the weld meant

Answer 39

Gas

Question 40

To avoid undercutting the sides of a flat position in a MiG weld it may be necessary to __ on the sides

Answer 40

Pause

Question 41

Welding should not be performed when the ambient temperature is below what degrees

Answer 41

0 degrees

Question 42

In MIG welding the electrode wire from the wire spool is driven the cable gun by a

Answer 42

Wire feeder

Question 43

One of the disadvantages of flux core arc welding is that it requires the ___ removal and __ cleaning

Answer 43

Slag, weld

Question 44

The TIG welder must posses good manual dexterity as well as manually controlling a variety of variables during welding, some of these are…

Answer 44

All the above

Question 45

Reverse polarity is not generally used in TIG because it will ___ the tungsten electrode

Answer 45

Melt

Question 46

The inert gasses most commonly used in TIG welding are argon and ___

Answer 46

Helium

Question 47

By letting up on but not completely the foot pedal on TIG welding foot control the amperage will ___

Answer 47

Decrease

Question 48

Preheating is the application of heat to the base metal immediately ___ welding, brazing, soldering …

Answer 48

Before

Question 49

In the flux core arc welding process the shielding of the weld is provided by the flux …

Answer 49

Contained within the tubular electrode

Question 50

The proper selection of filler metals for a specific application depends on identification of the ___ ___

Answer 50

Base metal

Question 51

When TIG welding heavier materials, ___ amperage is required

Answer 51

Higher

Question 52

Air carbon arc cutting process is commonly used in ___ and ___ metals

Answer 52

Cutting and gouging

Question 53

Identify 8 ways to control distortion

Answer 53

1. Clamps 2. Weld both sides 3. Minimize heat with amps 4. Use large electrode diameter 5. Don’t over weld 6. Don’t allow overheat in one area 7. Use stitch method 8. Weld in same direction

Question 54

Electrodes

Answer 54

E6010 ER70s-6 ER316L E71t-7