AGSYSMT 2240 Final
fill-freeze
A ___ electrode has a moderate type of penetration.
phosphorus
AWS restricts the level of sulfur and ____ in GMAW electrodes due to undesirable welds and cracking.
current
Amperage is kept constant with a constant ___ power source.
all of the above
Proper FCAW gun selection depends on which factors?
30-50 CFH
Recommended flow rate for helium gas when GTA welding is ___.
butt
Two pieces of material that are aligned edge to edge in the same plane is a ____ joint.
125
When welding on 1/8" in. thick steel, you should set your amperage to ____ amps.
better penetration
When welding with DCEN, the heat is concentrated in the work resulting in ____.
cold lap
A common problem with GMAW-S is ___.
carbon dioxide
A deep and broad penetration profile characterizes the use of ___ as a shielding gas in the GMAW process.
rejectable
A defect is a weld flaw large enough to render the weld ___.
uniformity
A discontinuity is the interruption in the ___ of a weld.
shielding gas
A gas-shielded gun assembly has multiple O-rings, if these O-rings become damaged or missing it will cause loss of ____.
concavity
A weld face that has a curving inward shape has ___.
Convexity
A weld face that is high and rounded in shape has ___.
defect
A weld flaw significant enough to render the weld rejectable is a ____.
tensile strength
Ability of metal to resist forces attempting to pull it apart or stretch it is called ____.
70,000
An E71T-X FCAW electrode will have a minimum of ___ psi tensile strength.
Portability
An advantage to using FCAW-S versus FCAW-G is ____.
minimal spatter
An advantage to using a FCAW-G electrode is ____.
helium
Argon and ___ are classified as inert shielding gases.
consistent welds
Body weight distribution and a good stance during a weld results in ___.
deeper, broader
Carbon dioxide produces a penetration profile that is _____ and ______ that that of an argon blended shielding gas.
2500
Cylinders are under extreme pressure at approximately ___ psi.
secured
Cylinders must be ___ and in the upright position when storing and using.
toes
Edges of a weld are called ____.
amperage
Electrode diameter will limit _____.
amperage
Electrode holders are rated by the ___ of the electrodes they hold.
additional shielding gas
FCAW-S electrodes do not require _____.
constant voltage
For FCAW power sources, the output characteristics fall into two main categories: constant current (CC) and ___.
A5.00
For Gas Shielded Arc Welding the AWS Specification for Carbon Steel Filler Metals is ___.
diameter
GTAW electrode stickout should be 2-3 times the _____ of the electrode.
DCEP
Gas-shielded electrodes use ____ polarity to ensure proper fusion.
manganese
Higher silicon and ___ deoxidizer level enhances toe wetting and finished weld bead appearance.
convexity of the bead
If arc voltage, WFS and CTWD are held constant, too fast travel speed increases____.
increase current
If the arc voltage, wire feed speed, and travel speed are held constant, decreasing the CTWD will ____.
replaced
If the protective insulation of the cable is damaged, and the cable is exposed, it needs to be ____.
post flow
If the tungsten electrode is purple or dark blue it is a sign of inadequate ____.
DCEN
In GTAW____ polarity results in better penetration and the heat is concentrated in the work piece.
electromagnetic fields
In order to minimize exposure to ___ never coil the electrode lead around your body.
wider
In the FCAW process as voltage increase, arc length gets longer resulting in the arc cone being ____ .
all of the above
Larger diameter electrodes usually ___ .
load cycle
Load range and ____ are the two basic components of fatigue on a weld.
operating factor
One of the limitations of SMAW welding is _____.
shielding
Porosity is a hole in the weld from lack of ______.
10-15 degree push
Running a bead keeping a gap of about 1/16 - 1/8 in. hold the GTAW torch at a ____ angle.
transformer
The ___ inside a welding power source converts high voltage, low amperage electricity into low voltage, high amperage electricity for welding.
whipping
The ___ technique is used with the fast-freeze electrode type.
arc length
The arc voltage for GTAW increases with ____ .
ER70S-6
The classification of the electrode that contains the highest levels of silicon is ____.
unplug or lockout/tagout machine
The first step in cleaning the power source is to ____.
CTWD
The four major welding variables with both FCAW-S and FCAW-G are arc voltage, wire feed speed, travel speed, and ____.
undersell
The lack of sufficient weld metal to complete the weld as desired or expected is called ___.
Usability characteristics
The last digit of the FCAW electrode classification system indicates the ____ .
tensile strength
The main difference between an E81T-X electrode and an E71T-X electrode is ____.
75% Ar / 25% CO2
The most common type of mixed shielding gases used with FCAW-G in North America is ____.
duty cycle
The percentage of time in a 10 minute period that a power source can be operated continuously at the rated amperage before over heating is ____.
oxygen
The three elements that need to be present for a fire are ___, heat and fuel.
range of motion
The welder's ability to weld a long distance and maintain comfort refers to ____.
shade
The welding current determines the ___ number lens required.
stringer
These beads can be used in flat, vertical and overhead positions.
tensile
This test is an actual measure of the amount of force required to pull a weld sample apart:
foot pedal
To control amperage during GTAW process the operator uses a ___.
all the way
To provide a proper seal, double-seat seal cylinder valves must be opened ___.
nickel
To provide corrosion resistance on weathered steel when welding requires the electrode to contain 1% ___.
50/50
Using balanced AC polarity ____% of the heat generated from the arc is directed into the base metal and ____% is directed to the arc.
tapping
Using the ___ method to initiate the welding arc minimizes arc strikes on the metal surface.
undercut
Weld defect in which the base metal at the toe of the weld on one or both sides is eroded by the heat of the arc is called ____.
atmospheric contamination
Weld shielding provides protection of the arc stream and prevents ___.
travel speed
Welding operation inspection includes which of the following ____.
low-voltage, high-amperage
Welding power sources use a step-down transformer that takes high voltage, low-amperage AC input and changes it to ___ AC welding current.
all of the above
Welding power supplies have ___ that needs to be blown out periodically.
fast, narrow
Welding too ____ a travel speed produces a _____ bead sitting on top of the base metal.
DCEP
Welding with GMAW utilizes the polarity ____ .
Underfill
When a bead is produced with the amperage too low, ___ can occur.
1/4 in
When preparing a 1/8 in. tungsten electrode the tip length should be around ____.
length
When purchasing cables, select the appropriate cable based on both ___ and amperage.
electrical
When trouble shooting a GMAW system categorize the problem into one of the three groups: wire delivery, gas delivery or ___.
as close
When welding make sure the work cable is connected ___ to the part being welded.
visual inspection
Which of the following is a non-destructive method of evaluating a weld?
permits AC TIG wave balance control adjustment from maximum penetration to maximum cleaning
Which term most closely matches the term "AC Balance Control"?
displays the output current level
Which term most closely matches the term "Digital Meter"?
connects the power source to the electrode lead and gas hose
Which term most closely matches the term "Electrode/Gas Output Receptacle"?
presets the maximum output current level with the remote amptrol
Which term most closely matches the term "Maximum Output Control"?
changes welding modes from stick mode to TIG mode
Which term most closely matches the term "Mode Switch"?
adjusts polarity from AC to DC
Which term most closely matches the term "Polarity Switch"?
sets the shielding gas flow time after the arc is shut off
Which term most closely matches the term "Post Flow Timer"?
turns machine on
Which term most closely matches the term "Power Switch"?
adjusts the pulse frequency
Which term most closely matches the term "Pulse TIG Control"?
provides connection for remote control or arc start switch
Which term most closely matches the term "Remote Receptacle"?
indicates internal overheating with yellow light
Which term most closely matches the term "Thermal Shutdown Light"?
connects the power source to the work cable
Which term most closely matches the term "Work Stud"?
axial spray
___ mode of metal transfer creates an excellent finish weld bead appearance and has the highest operator appeal.
short circuit
___ mode of metal transfer is capable of root pass work on pipe and has all weld position capability.
globular transfer
___ mode of metal transfer typically begins at 125 amps and uses a continuously fed solid-or metal-cored wire electrode depositing in a combination of short circuits and gravity assisted large drops.
inverters
____ have the advantage of being able to vary the frequency of the AC welding output.
spray transfer
____ was the earliest metal transfer mode for the GMAW process.
potassium, sodium
_____ and _____ are alloying elements added to the FCAW electrodes to stabilize the arc.
increasing, decreased
_____ electrode extension increases the resistance to the flow of current in the electrode and the current in the arc is _____.
fast-fill
______ electrodes are well suited for high-speed welding on horizontal surfaces.
