GMAW 1
AWS restricts the level of sulfur and ____ in GMAW electrodes due to undesirable welds and cracking.
Phosphorus
Welding too ____ a travel speed produces a _____ bead sitting on top of the base metal.
Fast, narrow
Electrode diameter will limit _____.
Amperage
To provide a proper seal, double-seat seal cylinder valves must be opened ___.
All the way
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
Higher silicon and ___ deoxidizer level enhances toe wetting and finished weld bead appearance.
Manganese
Manganese
Welding with GMAW utilizes the polarity ____ .
DCEP
Cylinders are under extreme pressure at approximately ___ psi.
2500
___ 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.
Globular transfer
When welding make sure the work cable is connected ___ to the part being welded.
As close
Argon and ___ are classified as inert shielding gases.
Helium
___ mode of metal transfer is capable of root pass work on pipe and has all weld position capability.
Short circuit
To provide corrosion resistance on weathered steel when welding requires the electrode to contain 1% ___.
Nickel
Load range and ____ are the two basic components of fatigue on a weld.
Load cycle
For Gas Shielded Arc Welding the AWS Specification for Carbon Steel Filler Metals is ___.
A5.18
Classification of electrode that contains the highest levels of silicon is ____
ER70S-6
Larger diameter electrodes usually ___ .
All of the above
___ mode of metal transfer creates an excellent finish weld bead appearance and has the highest operator appeal.
Axial spray
Welding operation inspection includes which of the following ____.
Travel speed
When trouble shooting a GMAW system categorize the problem into one of the three groups: wire delivery, gas delivery or ___.
Electrical
_____ electrode extension increases the resistance to the flow of current in the electrode and the current in the arc is _____.
Increasing, decreased
A common problem with GMAW-S is ___.
Cold Lap
A deep and broad penetration profile characterizes the use of ___ as a shielding gas in the GMAW process.
Carbon Dioxide