Welding & Cutting Processes Flashcards
Learn about SMAW, GMAW, FCAW, GTAW, EBW, LBW, OAC, PAC, CAC-A and more! (145 cards)
1
Q
Which cutting process is shown here?
A
Oxy-Acetylene Cutting
(OAC)
2
Q
What types of fuel gases can be used for OFC (oxy-fuel cutting)?
A
- Acetylene
- Natural Gas
- MAPP
- Propylene
3
Q
The intense white portion adjacent to the cone of a carburizing oxyacetylene flame is called:
A
Acetylene feather
4
Q
The conical part of an oxyfuel gas flame adjacent to the tip orifice is called:
A
The cone
5
Q
For OAC (oxy-acetylene cutting), what are the three types of flames?
A
- Carburizing
- Neutral
- Oxidizing
6
Q
An oxyfuel gas flame that is neither oxidizing nor reducing is called:
A
Neutral flame
7
Q
This type of torch tip is used for what?
A
Scarfing or gouging
8
Q
Which welding process is a chemical process?
A
Oxy-Acetylene Welding
(OAW)
9
Q
Which welding process is shown here?
A
Oxy-Acetylene Welding
(OAW)
10
Q
What is the main difference between brazing and welding?
A
Brazing doesn’t melt the base metal.
11
Q
Can OFC (oxy-fuel cutting) cut stainless steel?
A
No
12
Q
Two-piece torch cutting tips are used with which fuel gases?
A
Propane and natural gas
13
Q
Ceramics can be welded to steel using what welding process?
A
Braze Welding
(BW)
14
Q
Which welding process relies on capillary action?
A
Braze Welding
(BW)
15
Q
A soldering process in which the filler metal is applied to the joint prior to the application of heat is called:
A
Reflow soldering
16
Q
Soldering filler metal melts below what temperature?
A
840°F
17
Q
The force by which liquid can be drawn into closely fitted faying surfaces, opposite gravity, is called:
A
Capillary action
18
Q
BAg, BAu and BNi are examples of:
A
Brazing filler metal classifications
19
Q
Braze filler metal melts above what temperature?
A
840°F
20
Q
In brazing or soldering, a material applied to surfaces adjacent to a joint to limit the spread of filler metal or flux is called:
A
Stopoff
21
Q
A brazing process using the heat from a molten bath is called:
A
Dip brazing
22
Q
The group of welding processes producing coalescence of workpieces by melting them with an arc is called:
A
Arc welding
23
Q
The manual welding process using acetylene and a torch is called?
A
Oxy-Acetylene Welding
(OAW)
24
Q
Which portable, manual welding process has the least complicated equipment but is relatively slow?
A
Shielded Metal Arc Welding
(SMAW)
25
An electrode classified E10014 has a minimum specified tensile strength of what?
100,000 psi (100 ksi)
26
What are the **four purposes** of the flux coating on SMAW (shielded metal arc welding) electrodes?
* Shielding
* Alloying
* Insulating
* Deoxidation
27
Can an E7018 electrode be used on AC (alternating current)?
Yes
28
SMAW (shielded metal arc welding) electrodes that end in 0 or 1 are called what?
Cellulosic
29
Cellulosic SMAW (shielded metal arc welding) electrodes give deeper penetration, can be used downhill, and end in:
0 or 1
30
An electrode holder is an **essential part** of what welding process?
Shielded Metal Arc Welding
| (SMAW)
31
In SMAW (shielded metal arc welding), an increase in arc length will result in:
Increased voltage
32
What type of electrodes must be **stored in ovens**?
Low hydrogen
33
SMAW (shielded metal arc welding) is most often used on what current and polarity?
Direct Current, Electrode Positive
| (DCEP)
34
The last digit of an SMAW (shielded metal arc welding) electrode designates:
Operating characteristics
35
Low hydrogen SMAW (shielded metal arc welding) electrodes end in what numbers?
5, 6 or 8
36
Low hydrogen electrodes must be kept in a closed container in such a way as to prevent the passage of air or gas in either direction, which is called:
Hermetically sealed
37
The **electrode classification E12018** has a minimum specified tensile strength of what?
120,000 psi
| (120 ksi)
38
An **E6021 electrode** can be used in what positions?
Flat and horizontal only
39
Fast-freeze, fast-fill, fill-freeze and low hydrogen are the four groups of SMAW (shielded metal arc welding) electrodes that the AWS calls:
F-Numbers
40
An **E7041 electrode** can be in what position?
Vertical down
41
The next to last digit of an SMAW (shielded metal arc welding) electrode designates:
Position
42
SMAW (shielded metal arc welding) electrodes that end in 5, 6, or 8 are called what?
Low hydrogen
43
Which welding process is performed in the flat position with vertical progression?
Electro-Slag Welding
| (ESW)
44
Which **welding process** is shown here?
Electro-Slag Welding
| (ESW)
45
Which welding process uses water-cooled dams to contain the molten weld pool?
Electro-Slag Welding
| (ESW)
46
The **heat for ESW** (electro-slag welding) is provided by:
Electrical resistance of the molten slag
47
Which welding processes are **not considered arc welding processes**?
Resistance Spot and Electro-Slag Welding
| (RSW and ESW)
48
Which **welding process** is shown here?
Submerged Arc Welding
| (SAW)
49
SAW (submerged arc welding) can be used in which positions?
Flat and horizontal only
50
An electrode classified as **F7P6-EM12** is used with which process?
Submerged Arc Welding
| (SAW)
51
Which welding process uses a **hopper to dispense granular flux**?
submerged arc welding
| (SAW)
52
In general, CAC (carbon arc cutting) is done on what current and polarity?
Direct Current, Electrode Positive
| (DCEP)
53
What is the **most common application** for CAC (carbon arc cutting)?
Gouging
54
The cutting process that uses compressed air to blow molten metal out of the cut is called:
Carbon Arc Cutting
| (CAC)
55
What cutting process can use an SMAW (shielded metal arc welding) power source?
Carbon Arc Cutting
| (CAC)
56
Which **cutting process** is shown here?
Carbon Arc Cutting
| (CAC)
57
The manner in which molten metal travels from the end of a consumable electrode across the welding arc to the workpiece is called:
Transfer mode
58
Which GMAW (gas metal arc welding) transfer mode results in the least amount of penetration?
Short circuiting
59
What is the minimum specified tensile strength of an **E70S-6 electrode**?
70,000 psi (70 ksi)
60
In GMAW (gas metal arc welding), the distance from the **end of the contact tube to the end of the electrode** is:
Electrode extension
61
In GMAW (gas metal arc welding), the distance from the **end of the gas nozzle to the end of the electrode** is:
Stickout
62
Which GMAW (gas metal arc welding) transfer mode provides the least amount of heat to the work piece and is, therefore, prone to lack of fusion?
Short circuiting
63
Which **GMAW** (gas metal arc welding) **transfer mode** is shown here?
Short circuiting
64
What are the **four transfer modes** of GMAW (gas metal arc welding)?
* Globular
* Spray
* Pulsed arc
* Short circuiting
65
Which **GMAW** (gas metal arc welding) **transfer mode** is shown here?
Pulsed arc
66
GTAW electrodes have the same specifications and classifications as which other process?
Gas Metal Arc Welding
| (GMAW)
67
What does **GMAW-P** stand for?
Gas Metal Arc Welding in Pulsed arc transfer mode
68
What does **GMAW-G** stand for?
Gas Metal Arc Welding in Globular transfer mode
69
In Gas Metal Arc Welding (GMAW) the transfer of molten metal in large drops from the consumable electrode across the arc is called:
Globular transfer mode
| (GMAW-G)
70
What does **GMAW-S** stand for?
Gas Metal Arc Welding in Short circuiting transfer mode
71
The Gas Metal Arc Welding (GMAW) transfer mode in which the consumable electrode is deposited during repeated short circuits is called:
Short Circuiting
| (GMAW-S)
72
The Gas Metal Arc Welding (GMAW) transfer mode in which molten metal from a consumable electrode is propelled across the arc in small droplets is called:
Spray
| (GMAW spray)
73
Which semi-automatic welding process provides higher deposition rates and can be used in all positions but requires a special shielding gas and power source?
Gas Metal Arc Welding in Pulsed-spray Transfer Mode
| (GMAW-P)
74
Which semi-automatic welding process has higher deposition rates and no spatter but uses a special shielding gas and is limited to flat and horizontal only?
Gas Metal Arc Welding in Spray Transfer Mode
| (GMAW spray)
75
Which semi-automatic welding process provides high deposition rates by using a larger diameter filler metal but creates a good deal of spatter and is limited to flat and horizontal only?
Gas Metal Arc Welding in Globular transfer mode
| (GMAW-G)
76
Which semi-automatic welding process provides high-productivity and less distortion but has a proclivity for lack of fusion?
Gas Metal Arc Welding in Short Circuiting Transfer Mode
| (GMAW-S)
77
Which GMAW (gas metal arc welding) transfer modes can be used in all positions?
Short-circuiting and pulsed spray
78
In the electrode classification ER70S-6, the '**S**' stands for:
Solid
79
Which shielding gas is most commonly used for GMAW (gas metal arc welding) in the spray transfer mode?
98%Ar/2%Co2
80
In GMAW (gas metal arc welding), square wave refers to what?
The shape of the output power
81
Which **GMAW** (gas metal arc welding) **transfer mode** is shown here?
Spray
82
What is the **most common shielding gas** used with GMAW (gas metal arc welding)?
75% Argon / 25% CO₂
83
Comparing 75%Ar/25% CO2 and 100% CO₂, which will have **greater penetration**?
100% CO₂
84
What is the only thing that must be **changed** to switch between GMAW (gas metal arc welding) and FCAW (flux cored arc welding)?
The filler material
85
Which semi-automatic welding process provides high deposition rates, tolerates contamination and can be self or gas shielded?
Flux Cored Arc Welding
| (FCAW)
86
Which **welding process** is shown here?
Flux Cored Arc Welding (gas shielded)
| (FCAW-G)
87
What part of a **FCAW** (flux cored arc welding) **system** is optional?
Shielding gas
88
For FCAW (flux cored arc welding) and GMAW (gas metal arc welding), what electrical variable is controlled by wire feed speed?
Amperage
89
Which **two shielding gases** are most commonly used with FCAW (flux cored arc welding)?
75% Ar / 25% CO₂ and 100% CO₂
90
In the electrode classification E71T-5, the **second digit** refers to what?
Position
91
In the electrode classification E71T-1, the '**T**' stands for:
Tubular
92
What does **FCAW-G** stand for?
Flux Cored Arc Welding, Gas Shielded
93
What does **FCAW-S** stand for?
Flux Cored Arc Welding, Self-shielded
94
This **type of gun** is used for which welding process?
Flux Cored Arc Welding - Self Shielded
| (FCAW-S)
95
This electrode, shown under high magnification, is used with which welding process?
Flux Cored Arc Welding
| (FCAW)
96
Which welding process uses a **tubular electrode**?
Flux Cored Arc Welding
| (FCAW)
97
Can an E71T-8 electrode be used in the overhead position?
Yes
98
What is the minimum specified tensile strength of an **E71T-1 electrode**?
70,000 psi (70 ksi)
99
A collet and collet body are essential parts of what welding process?
Gas Tungsten Arc Welding
| (GTAW)
100
Is a wire feeder a typical part of a GTAW (gas tungsten arc welding) system?
No
101
Which manual welding process is well suited for thin materials, exotic alloys and provides pinpoint accuracy but is relatively slow and expensive?
Gas Tungsten Arc Welding
| (GTAW)
102
Which **welding process** is shown here?
Gas Tungsten Arc Welding
| (GTAW)
103
Which welding process may use a **remote amperage control**?
Gas Tungsten Arc Welding
| (GTAW)
104
Pure tungsten electrodes are marked with a green stripe and are most commonly used for welding:
Aluminum
105
The electrode for GTAW (gas tungsten arc welding) is made from:
Tungsten
106
The electrode designation **EWTh-1** means what?
1% thoriated tungsten
107
The **tip of pure tungsten** is prepared in what way?
Balled
108
Tungsten electrodes with a red stripe have how much **thorium**?
2%
109
What shielding gas is most commonly used for GTAW (gas tungsten arc welding)?
100% Argon
110
The mechanical clamping device used to hold the electrode in position within the GTAW (gas tungsten arc welding) torch is called:
The collet
111
Tungsten is usually alloyed with what for the welding of carbon steel?
Thorium
112
The device used to exert pressure on the collet in a GTAW (gas tungsten arc welding) torch and hold the tungsten in place is called:
The back cap
113
GTAW (gas tungsten arc welding) and PAW (plasma arc welding) differ from other welding processes in that they use:
A non-consumable electrode
114
Which welding processes use a **non-consumable electrode**?
Gas Tungsten and Plasma Arc Welding
| (GTAW and PAW)
115
What welding process can have **either a transferred or nontransferred arc**?
Plasma Arc Welding
| (PAW)
116
Which **welding process** is shown here?
Plasma Arc Welding
| (PAW)
117
What does **PAC** stand for?
Plasma Arc Cutting
118
A **constricting orifice** is a feature of what process?
Plasma Arc Welding
| (PAW)
119
What cutting process can be used to **cut any type of metal**?
Plasma Arc Cutting
| (PAC)
120
A gas that has been heated to ionizing, allowing it to conduct electricity describes what state of matter?
Plasma
121
What welding process is a **solid state process**?
Diffusion Welding
| (DW)
122
Which welding processes use the **keyhole technique**?
* Laser Beam Welding
* Electron Beam Welding
* Plasma Arc Welding
| (LBW, EBW, and PAW)
123
Which **welding process** is shown here?
Resistance Spot Welding
| (RSW)
124
**Slag inclusions** may result from which welding processes?
Shielded Metal, Flux Cored, Electro-Slag, Submerged Arc Welding
| (SMAW, FCAW, ESW, SAW)
125
Which welding processes use a **wire feeder**?
Gas Metal Arc, Flux Cored Arc, Submerged Arc, Electro-Slag Welding
| (GMAW, FCAW, SAW, ESW)
126
All the items pictured can be welded in **less than 1 second** using which process?
Stud Welding
| (SW)
127
In stud welding, the ceramic device surrounding the stud base to contain the molten metal and shield the arc is called:
A ferrule
128
A **ferrule** is used for shielding which welding process?
Stud Welding
| (SW)
129
**Filler metal specifications** are found in which documents?
AWS A5.1 through A5.3X
130
While using GTAW (gas tungsten arc welding) and SMAW (shielded metal arc welding), which electrical variable is controlled by arc length?
Voltage
131
The **distance** from the contact tip to the end of the gas nozzle is called:
Setback
132
The **length** of electrode extending beyond the end of the contact tip is called:
Electrode extension
133
The tip of a 2% thoriated tungsten is prepared in what way?
Truncated conical
134
An electrode designated **ER70S-2** could be used with which processes?
Gas Metal Arc or Gas Tungsten Arc Welding
| (GMAW or GTAW)
135
Of the following electrodes, which would produce the strongest weld?
ER70S-6
E70T-5
E7018
F7A2-EM12K
They all produce welds with a minimum specified tensile strength of 70,000 psi (70ksi).
136
Why is oven storage of low-hydrogen electrodes important?
To protect them from atmospheric moisture.
137
In GMAW, the **electrode** is:
Consumable, continuous, bare
138
In an E7018 electrode, what does the '**E**' designate?
Electrode
139
An **E7024 electrode** may be used in what positions?
Flat and horizontal fillets
140
SMAW electrodes with an iron powder coating end in what digit?
4
141
Which process would an **E70T-4 electrode** be used with?
FCAW (self-shielded)
142
Continuous solid wire electrode used in semi-automatic welding would be used with which process?
GMAW
143
'**Reverse polarity**' is a common term for what?
DCEP
144
Name the position numbers for **SMAW electrodes**.
1 = all positions
2 - flat and horizontal (fillets)
4 = vertical down
145
Name the position numbers for **FCAW electrodes**.
0 = flat and horizontal
1 = all positions
