2240 FINAL
An E71T-X FCAW electrode will have a minimum of ___ psi tensile strength. 700 70,000 700,000 7,000
70,000
For Gas Shielded Arc Welding the AWS Specification for Carbon Steel Filler Metals is ___. A5.18 A5.00 A5.28 A5.50
A5.00
Weld shielding provides protection of the arc stream and prevents ___. Undercut Cold lap Atmospheric contamination Polarity
Atmospheric contamination
Welding with GMAW utilizes the polarity ____ . AC CFH DCEN DCEP
DCEP
Two pieces of material that are aligned edge to edge in the same plane is a ____ joint. Lap Corner Butt Edge
butt
To control amperage during GTAW process the operator uses a ___. Collet Electrode Torch Foot pedal
foot pedal
Which of the following is a non-destructive method of evaluating a weld? Tensile test Bend test Visual inspection Macro Etch
visual inspection
The ___ technique is used with the fast-freeze electrode type. Overhead Padding Whipping Root pass
whipping
When preparing a 1/8 in. tungsten electrode the tip length should be around ____. 3/32 in. 1/16 in. 1/4 in 1/8 in.
1/4 in
Running a bead keeping a gap of about 1/16 - 1/8 in. hold the GTAW torch at a ____ angle. 5-10 degree push 10-15 degree push 5-10 degree pull 10-15 degree pull
10-15 degree push
When welding on 1/8" in. thick steel, you should set your amperage to ____ amps. 100 175 125 150
125
Cylinders are under extreme pressure at approximately ___ psi. 2500 3500 1500 4500
2500
Recommended flow rate for helium gas when GTA welding is ___. 20-30 CFH 15-25 CFH 30-50 CFH 10-20 CFH
30-50 CFH
Using balanced AC polarity ____% of the heat generated from the arc is directed into the base metal and ____% is directed to the arc. 30/70 50/50 40/60 70/30
50/50
The most common type of mixed shielding gases used with FCAW-G in North America is ____. 90% Ar / 10% CO2 75% Ar / 25% CO2 70% Ar / 30% CO2 80% Ar / 20% CO2
75% Ar / 25% CO2
FCAW-S electrodes do not require _____. Work clamp Additional shielding gas Power source Wire feeder
Additional Shielding Gas
Which term most closely matches the term "Polarity Switch"? Adjusts the pulse frequency Permits AC TIG wave balance control adjustment from maximum penetration to maximum cleaning Provides connection for remote control or arc start switch Adjusts polarity from AC to DC
Adjusts polarity from AC to DC
Larger diameter electrodes usually ___ . Feed better Cost less Carry more current All of the above
All of the above
Proper FCAW gun selection depends on which factors? Level of current required Use of compressed shielding gas Type of welding All of the above
All of the above
Welding power supplies have ___ that needs to be blown out periodically. Wiring Transformers Cooling apparatus All of the above
All of the above
To provide a proper seal, double-seat seal cylinder valves must be opened ___. 1 turn 1/2 turn 1/4 turn All the way
All the way
Electrode holders are rated by the ___ of the electrodes they hold. Amperage Weight Material Color
Amperage
When welding make sure the work cable is connected ___ to the part being welded. Perpendicular Parallel As close at a right angle
As close
___ mode of metal transfer creates an excellent finish weld bead appearance and has the highest operator appeal. None of the above Globular transfer Axial spray Short circuit
Axial Spray
When welding with DCEN, the heat is concentrated in the work resulting in ____. Excessive spatter Better penetration Melted Tungsten Cleaning action
Better penetration
The four major welding variables with both FCAW-S and FCAW-G are arc voltage, wire feed speed, travel speed, and ____. Electrode Amperage Weld position CTWD
CTWD
Body weight distribution and a good stance during a weld results in ___. Extra strain on operator Increased fatigue Poor sight line Consistent welds
Consistent welds
For FCAW power sources, the output characteristics fall into two main categories: constant current (CC) and ___. Constant voltage Contact tip-to-work distance Wire feed speed Constant amperage
Contant Voltage
If arc voltage, WFS and CTWD are held constant, too fast travel speed increases____. Convexity of the bead Deposition rate Slag interference Burnthrough
Convexity of the bead
Amperage is kept constant with a constant ___ power source. Travel Current Voltage Wire
Current
In GTAW____ polarity results in better penetration and the heat is concentrated in the work piece. AC+ DCEN AC- DCEP
DCEN
Gas-shielded electrodes use ____ polarity to ensure proper fusion. DCEP DCEV DCEN DCEA
DCEP
Carbon dioxide produces a penetration profile that is _____ and ______ that that of an argon blended shielding gas. Deeper, broader Shallow, narrower Deeper, narrower Shallow, broader
Deeper, broader
A weld flaw significant enough to render the weld rejectable is a ____. Inconsistency Penetration Discontinuity Defect
Defect
GTAW electrode stickout should be 2-3 times the _____ of the electrode. Arc Diameter Length Heat
Diameter
Which term most closely matches the term "Digital Meter"? Adjusts the pulse frequency Presets the maximum output current level with the remote amptrol Permits AC TIG wave balance control adjustment from maximum penetration to maximum cleaning Displays the output current level
Displays the output current level
The classification of the electrode that contains the highest levels of silicon is ____. ER70S-7 ER70S-6 ER70S-7 ER70S-4
ER70S-6
If the arc voltage, wire feed speed, and travel speed are held constant, decreasing the CTWD will ____. ncrease porosity Reduce current Reduces voltage Increase current
Increase Current
____ have the advantage of being able to vary the frequency of the AC welding output. Rectifiers Reactors Inverters Transformers
Inverters
When purchasing cables, select the appropriate cable based on both ___ and amperage. Voltage Length Transformer Electrode
Length
Load range and ____ are the two basic components of fatigue on a weld. Load cycle Ductility Toughness Tensile strength
Load Cycle
Higher silicon and ___ deoxidizer level enhances toe wetting and finished weld bead appearance. Zirconium Vanadium Manganese Molybdenum
Manganese
An advantage to using a FCAW-G electrode is ____. Protective slag Minimal spatter Worm tracking Smoke and fumes
Minimal Splatter
To provide corrosion resistance on weathered steel when welding requires the electrode to contain 1% ___. Nickel Chromium Manganese Aluminum
Nickel
Which term most closely matches the term "AC Balance Control"? Connects the power source to the work cable Displays the output current level Sets the shielding gas flow time after the arc is shut off Permits AC TIG wave balance control adjustment from maximum penetration to maximum cleaning
Permits AC TIG wave balance control adjustment from maximum penetration to maximum cleaning
AWS restricts the level of sulfur and ____ in GMAW electrodes due to undesirable welds and cracking. Zirconium Phosphorus Silicon Copper
Phosphorus
An advantage to using FCAW-S versus FCAW-G is ____. Melt off Portability Smoke and fumes Arc transfer
Portability
_____ and _____ are alloying elements added to the FCAW electrodes to stabilize the arc. Titanium, carbon Silicon, molybdenum Calcium, nickel Potassium, sodium
Potassium, Sodium
Which term most closely matches the term "Maximum Output Control"? Presets the maximum output current level with the remote amptrol Turns machine on Adjusts the pulse frequency Displays the output current level
Presets the maximum output current level with the remote amptrol
The welder's ability to weld a long distance and maintain comfort refers to ____. Range of motion Arc length Fume plume Arc length
Range of Motion
If the protective insulation of the cable is damaged, and the cable is exposed, it needs to be ____. Ignored Used Covered Replaced
Replaced
Which term most closely matches the term "Post Flow Timer"? Sets the shielding gas flow time after the arc is shut off Connects the power source to the work cable Presets the maximum output current level with the remote amptrol Displays the output current level
Sets the shielding gas flow time after the arc is shut off
A gas-shielded gun assembly has multiple O-rings, if these O-rings become damaged or missing it will cause loss of ____. Roll tension Shielding gas Wire feed Electrical contact
Sheilding Gas
Ability of metal to resist forces attempting to pull it apart or stretch it is called ____. Ductility Brittleness Tensile strength Shear strength
Tensile Strength
The main difference between an E81T-X electrode and an E71T-X electrode is ____. Welding position Shielding gas Weld composition Tensile strength
Tensile Strength
Which term most closely matches the term "Power Switch"? Connects the power source to the electrode lead and gas hose Turns machine on Adjusts polarity from AC to DC Connects the power source to the work cable
Turns machine on
The first step in cleaning the power source is to ____. Adjust gas pressure regulator Remove the cabinet Unplug or lockout/tagout machine Adjust the feed roll tension
Unplug or lockout/tagout machine
The last digit of the FCAW electrode classification system indicates the ____ . Electrode Usability characteristics Welding position Tensile strength
Usability Characteristics
In the FCAW process as voltage increase, arc length gets longer resulting in the arc cone being ____ . Stable Narrower Shorter Wider
Wider
Which term most closely matches the term "Pulse TIG Control"? Adjusts the pulse frequency Permits AC TIG wave balance control adjustment from maximum penetration to maximum cleaning Presets the maximum output current level with the remote amptrol Provides connection for remote control or arc start switch
adjusts the pulse frequency
Electrode diameter will limit _____. Voltage Amperage Travel Speed CTWD
amperage
The arc voltage for GTAW increases with ____ . Travel speed Current Gas input Arc length
arc length
A deep and broad penetration profile characterizes the use of ___ as a shielding gas in the GMAW process. Argon Carbon dioxide Hydrogen Nitrogen
carbon dioxide
A common problem with GMAW-S is ___. Cold lap Excessive face reinforcement Undercut Porosity
cold lap
Which term most closely matches the term "Electrode/Gas Output Receptacle"? Provides connection for remote control or arc start switch Permits AC TIG wave balance control adjustment from maximum penetration to maximum cleaning Connects the power source to the electrode lead and gas hose Adjusts polarity from AC to DC
connects the power source to the electrode lead and gas hose
Which term most closely matches the term "Work Stud"? Changes welding modes from stick mode to TIG mode Permits AC TIG wave balance control adjustment from maximum penetration to maximum cleaning Connects the power source to the work cable Adjusts the pulse frequency
connects the power source to the work cable
Body weight distribution and a good stance during a weld results in ___. Poor sight line Extra strain on operator Consistent welds Increased fatigue
consistent welds
A weld face that is high and rounded in shape has ___. Concavity Overlap Convexity Fatigue
convexity
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 ____. Duty cycle Output range Open amperage Input range
duty cycle
When trouble shooting a GMAW system categorize the problem into one of the three groups: wire delivery, gas delivery or ___. Electrical Cold feed Electrode extension Travel speed
electrical
In order to minimize exposure to ___ never coil the electrode lead around your body. Primary voltage Secondary voltage Electromagnetic fields Lockout/Tagout
electromagnetic fields
Welding too ____ a travel speed produces a _____ bead sitting on top of the base metal. Slow, narrow Slow, narrow Fast, narrow Fast, wide
fast, narrow
______ electrodes are well suited for high-speed welding on horizontal surfaces. Fast-fill Fill-freeze Low-hydrogen Fast-freeze
fast-fill
A ___ electrode has a moderate type of penetration. Fill-freeze Fast-fill Low-hydrogen Fast-freeze
fill-freeze
___ 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. Short circuit None of the above Axial spray Globular transfer
global transfer
Argon and ___ are classified as inert shielding gases. Carbon dioxide Hydrogen Helium Nitrogen
helium
_____ electrode extension increases the resistance to the flow of current in the electrode and the current in the arc is _____. Decreasing, decreased Increasing, decreased Decreasing, reversed Increasing, increased
increasing, decreased
Which term most closely matches the term "Thermal Shutdown Light"? Adjusts polarity from AC to DC Adjusts the pulse frequency Indicates internal overheating with yellow light Displays the output current level
indicates internal overheating with yellow light
When purchasing cables, select the appropriate cable based on both ___ and amperage. Voltage Electrode Transformer Length
length
Welding power sources use a step-down transformer that takes high voltage, low-amperage AC input and changes it to ___ AC welding current. low-voltage, high-amperage high-voltage, low-amperage high-voltage, high-amperage low-voltage, low-amperage
low-voltage, high-amperage
One of the limitations of SMAW welding is _____. Outdoor weldability Portability Operating factor Shielding gas bottles
operating factor
The three elements that need to be present for a fire are ___, heat and fuel. Water Carbon Dioxide Oxygen Foam
oxygen
If the tungsten electrode is purple or dark blue it is a sign of inadequate ____. Frequency Pulse Post flow
post flow
Which term most closely matches the term "Remote Receptacle"? Permits AC TIG wave balance control adjustment from maximum penetration to maximum cleaning Provides connection for remote control or arc start switch Connects the power source to the work cable Presets the maximum output current level with the remote amptrol
provides connection foe remote control or arc start switch
A defect is a weld flaw large enough to render the weld ___. Code quality Attractable Acceptable Rejectable
rejectable
Cylinders must be ___ and in the upright position when storing and using. Damaged Electrically hot Secured Grounded
secured
The welding current determines the ___ number lens required. Classification Shade Arc Reflectivity
shade
Porosity is a hole in the weld from lack of ______. Underfill Shielding Reinforcement Spatter
shielding
___ mode of metal transfer is capable of root pass work on pipe and has all weld position capability. Short circuit Globular transfer Axial spray None of the above
short circuit
____ was the earliest metal transfer mode for the GMAW process. Short circuit transfer STT Spray transfer Globular transfer
spray transfer
These beads can be used in flat, vertical and overhead positions. Root pass Convex Concave Stringer
stringer
Using the ___ method to initiate the welding arc minimizes arc strikes on the metal surface. Sticking Tapping Pause Scratching
tapping
This test is an actual measure of the amount of force required to pull a weld sample apart: Face bend Macro Etch Root bend Tensile
tensile
Edges of a weld are called ____. Throat Toes Face Legs
toes
The ___ inside a welding power source converts high voltage, low amperage electricity into low voltage, high amperage electricity for welding. Inverter Transformer Rectifier Reactor
tranformer
Welding operation inspection includes which of the following ____. Joint alignment Travel speed Burn through Surface condition
travel speed
The lack of sufficient weld metal to complete the weld as desired or expected is called ___. Overlap Undercut Underfill Excessive reinforcement
undefiled
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 ____. Tungsten inclusion Distortion Porosity Undercut
undercut
When a bead is produced with the amperage too low, ___ can occur. Porosity Underfill Undercut Slag inclusion
underfill
A discontinuity is the interruption in the ___ of a weld. Size Uniformity Root Face
uniformity
