GTAW
OFC
SMAW
GMAW
ELECTRODES
SAFETY
SHIELDING GAS
POWER SOURCES
Weld Symbols
100
What polarity is typically used for welding mild steel in GTAW?
DCEN
100
Acetylene is extremely unstable at pressure over ___ psi.
15 psi
100
This discontinuity can occur from failing to properly clean slag between weld beads.
Slag inclusion
100
The polarity utilized when welding with the GMAW process is:
DCEP
100
For an ER70S-X filler rod, the “70” refers to _____.
70,000 psi minimum tensile strength
100
Where should spray from a fire extinguisher be directed?
At the base of the fire
100
What percentage of Argon is used for steel in GTAW?
100% argon
100
The most basic type of welder is a(n):
Transformer
100
Which item is a required part of a weld symbol include:
The Arrow
The Tail
The All around symbo
The Arrow
200
The _______ allows the operator to control the amperage during the welding process.
Foot amptrol or Petal
200
The chemical used to stabilize acetylene is ___.
Acetone
200
Undercutting the full length of a bead and along both toes is caused by:
excessive amperage
200
Which GMAW variable is directly correlated to amperage?
WFS
200
The most popular GMAW electrode is:
ER70S-6
200
Welding jackets or sleeves should be made out of what type of material?
Wool or Cotton
200
_______gases combine chemically with the weld pool to produce a desirable effect.
Reactive
200
Welding power sources use a __________ type of transformer to create electricity for welding.
Step-down
200
Welding symbols are always read:
Left to Right
300
What tungsten contains radioactive material?
Thoriated, the red tungsten
300
The oxygen in OFC actually causes the ___ in molten steel to burn.
Iron Oxide
300
To avoid poor bead placement, the best technique is to use the:
correct electrode angles
300
One of the most common problems with short circuit transfer is:
Cold lap or lack of fusion
300
What does the 2 stand for in the SMAW electrode E7024?
Flat and horizontal position only
300
What components are required for material to burn? (the fire triangle)
Heat, oxygen, fuel
300
What process does the welding gas mixture C25 support?
GMAW-S
300
Which of the following electrical characteristics is kept constant with a constant current power source?
Amperage
300
What information that might be indicated in the tail includes:
Process
Notes
Specifications
400
The GTAW process was invented to improve welding on which type of metals for aircrafts during WW2.
Nonferrous metal alloys like aluminum and magnesium
400
Oxyfuel hoses are color-coded; oxygen hoses are ___, while fuel gas hoses are ___.
Green/ Red
400
If a completed bead has a thin and ropy appearance, the cause is most likely
Travel speed is too fast
400
What mode of transfer is represented?
Axial Spray Transfer
400
Which electrode has a cellulose based flux? E6011 or E7018
E6011
400
Highly toxic Phosgene Gas is formed when arc rays react with which kind of vapors?
Solvent vapors
400
The main component gas used in binary or ternary mixes for GMAW welding is:
Argon
400
Which polarity is also referred to as reverse polarity?
DCEP
400
What does Pitch indicate?
Center to center between welds
500
A defect from welding two pieces of metal together caused by to much heat and characterized by deformation of the base metal is called______?
Distortion
500
NEVER use ___ tubing to transport acetylene gas.
Copper
500
Large sized spatter present in just one area (short distance) of a bead is caused by:
arc length is too long
500
The_____ mode of transfer is the low-heat input mode of metal transfer for GMAW.
Short Circuit
500
Fast-Freeze electrodes typically have what kind of penetration?
Deep penetration
500
How far can sparks from welding fly?
35ft
500
You should set the shielding gas pressure at_____ CFH for GTAW.
30
500
Cables are rated according to_________.
amperage
500
If there is no length or pitch given for a fillet weld the weld length is:
Continuous
600
In this picture what is number 10 called?
The weld toes
600
The oxygen cylinder valve should be opened _____.
All the way open
600
The preferred technique for most welds in the 2G position is:
stringer beads
600
________transfer characteristically gives the appearance of large, irregularly shaped molten droplets that are larger than the diameter of the electrode.
Globular
600
What does the H mean in the electrode E7018-1-H4R?
Low hydrogen electrode, store in an oven
600
Cylinders must aways be kept is which position?
Horizontal, vertical, or inverted?
vertical
600
___________is inert at room temperature, but in the presence of the arc plasma and the molten weld puddle it is reactive?
CO2
600
CV power source designs provide a specific arc voltage for a given pre-selected:
WFS
600
A filled in flag symbol on the reference line indicates: 
Weld in the field
700
For thin gauge steel and stainless steel, follow the rule of thumb to never use a filler rod that is _____.
Thicker than the plate you are welding
700
A_______________________is a safety device that prevents flames from going back into the torch or cylinder.
Flashback arrestor
700
Excessive amperage will produce a bead that will:
be wide and flat
700
During short circuit transfer, the electromagnetic field surrounding the electrode provides the force that detaches the molten droplet from the end of the electrode. This is referred to as the______ effect.
Pinch
700
Mill scale, rust and other surface contaminants may justify the use of an electrode with a higher level of_____?
Deoxidizers
700
Cylinder valves with a double-seat seal must be opened ________ to provide a proper seal.
All the way
700
Axial-spray transfer requires CO2 contents less than:
20%
700
One of the biggest advantages to inverter-based welding power sources is:
Their portability
700
True or False:
The bottom side of the reference line is arrow side. 
True