Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Millwright 2nd Year > Electric Arc Welding > Flashcards

Electric Arc Welding Flashcards

0
Q

Is a number 9 welding lens darker or lighter than a number 14

A

Lighter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

What do welding helmets do

A

Protect your eyes and facial area from light
Heat
spatter
slag

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What do welding lenses do

A

Protect your eyes from:

ultraviolet infrared and visible light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What happens when you get arc flash and what does it feel like

A

Little water blisters form on your eyeballs

Feels like you have sand in your eyes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Two welding machine classifications

A

Constant current

constant voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does SMAW stand for

A

Shielded metal arc welding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does GMAW stand for

A

Gas metal arc welding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are three welding power sources

A

Transformers
inverters
generators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a duty cycle

A

A rating expressed as a percentage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

A welder with a higher duty cycle is better or worse for welding and why

A

Better because you can weld for a longer time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is arc blow

A

It condition encountered where extensive DC welding has been done at high heat’s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How many sizes do welding cables come in

A

8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the smallest and what is the largest welding cable you can get

A

4=smallest

4/0=largest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the two power sources for arc welding

A

Voltage and amperage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Define voltage

A

Causes current to flow in a conductor or to cross a gap as occurs in arc welding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Define amperage

A

Component that causes the electrode the parent metal or both to be melted

16
Q

What happens when you have a long arc length

A

Spatter loss is high
penetration is shallow
slag cover can be sloppy or incomplete shielding gases dissipate more quickly

17
Q

What happens if your arc length is too short

A

The beat is narrow and built-up penetration is deep
spatter loss is low
Molten slag covers the weld deposit

18
Q

What is straight polarity

A

Electrode is connected to the negative terminal

19
Q

What is reversed polarity

A

The electrode connected to the positive terminal

Most common

20
Q

What size is the most common arc welding electrode

A

14 inches

21
Q

In a CSA E4918 electrode what does the E stand for

A

A covered arc welding electrode

22
Q

In an AWS E7018 electrode what are the first two digits indicating

A

Minimum tensile strength

In this case 70,000psi

23
Q

What are four basic welding types

A

A groove weld
a fillet weld
a plug weld
a surfacing weld

24
Q

What are some advantages of gas metal arc welding

A

Skill requirements are lower
low current arcs are possible
good arc control makes the manual welding of joints with poor fit up possible

Millwright 2nd Year (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions