Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Cutting And Gouging Processes > Plasma Arc Cutting > Flashcards

Plasma Arc Cutting Flashcards

(51 cards)

Start Studying
1
Q

What is the minimum recommended lens shade for plasma cutting?

A

5

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

Why is a full helmet or cutting shield recommended for plasma cutting?

A

Protect from Ultraviolet light

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

What is the appropriate hearing protection for PAC?

A

Earplugs

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

Other workers should be protected from the ultraviolet light of plasma cutting if they are within how many meters?

A

10m (33ft)

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

True or false? Respiratory equipment should be worn when PAC, because the plasma arc is hot enough to vaporize the base metal.

A

True

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

What is the open circuit voltage range of PAC?

A

100-400 V

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

When unattended, What should be done to machines?

A

They should be turned off

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

What should be designated if there is a risk of a fire?

A

Fire watch

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

What is the biggest benefit of PAC?

A

It can be done on any metal that conducts electricity

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

What is plasma?

A

Ionized gas

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

The arc is started between the copper nozzle and what electrode?

A

Hafnium

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

The plasma jet can reach temperatures of?

A

30,000°C (54,032°F)

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

What is the most common gas used in PAC?

A

Compressed air

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

Hi current cutting requires what type of cool torches?

A

Water

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

True or false? Plasma cuts have a straight side and a slightly bevelled side

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What process is best suited for gouging aluminum?

A

Plasma arc gouging PAG 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

True or false? PAC can stack cut better than OFC (Oxyfuel gas cutting)

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the benefits of PAC on sheet metal?

A

No distortion, fast, and clean

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Compressed air used in PAC must be?

A

Dry/filtered

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Portable PAC units usually run on How many gases?

A

One

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

PAC power sources are what current?

Study These Flashcards
A

DCEN (direct current electrode negative)

22
Q

What is the voltage operating range?

23
Q

PAC power sources come in amperage ranges from 12 Amps too?

24
Q

Pilot arcs will usually shut off after how many seconds?

25
True or false? PAC control units will not allow the torch to fire if its senses an issue
Sure
26
What safety feature does a manual plasma torch have?
Interlocked on/off trigger
27
How are plasma torches rated?
Max Pierce thickness
28
What affects electrode life in PAC?
Dryness/cleanliness of Air Supply, number of cuts, and pilot arc on time
29
When should an electrode be replaced?
0.8 mm (1/32in) deep pit
30
What directs the plasma?
Nozzle
31
What is standoff?
Tip to work distance
32
True or false? Only heavy duty PAC torches require cooling
False
33
At what amperage are PAC torches usually water cooled?
100 amps
34
Which type of torch is more accurate? 1. Air cooled 2. air injected 3. water cooled 4. water injected
4. water injected
35
What can be used to reduce spatter buildup?
Anti-spatter spray
36
How can you repair cables with breaks in the insulation and exposed wires?
Replace with new cables
37
What is the other name for the ground cable?
Work peace lead
38
True or false? Plasma gas and secondary gases must match
False
39
What is the best gas for cutting stainless steel?
Nitrogen
40
What item is considered a consumable? 1. Air fittings 2. Cables and connecters 3. Electrode 4. PAC torch
3. Electrode
41
What range can plasma tables size from in either direction?
2-100 ft
42
True or false? most plasma tables can accept CAD files (Computer aided design (CAD) contains both 2-D and 3-D designs)
True
43
How do you reduce fumes, ultraviolet light, and noise on a plasma table?
By cutting on a water table
44
Aluminum should not be cut underwater with PAC because it could?
Explode
45
PAC current required and cutting speed depend on?
Material type and thickness
46
True or false? Excessive amperage is better than two little when PAC.
True
47
The three most cut medals with PAC are?
Low carbon steel, aluminum, and stainless steel
48
How can you tell if there is moisture in compressed air used in PAC?
Blow compressed air onto a lens or piece of glass and look for moisture
49
What is the most important factor to improve cut quality?
Travel speed
50
When cutting carbon steel at the correct travel speed what should the angle of the draglines be?
10 -15°
51
What happens when the nozzle touches the base metal?
Double arcing

Cutting And Gouging Processes (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions