Dr. Muller Advanced Welding GMAW - Questions With Answers Graded A+ Assured Success
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Dr. Muller Advanced Welding GMAW
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Dr. Muller Advanced Welding GMAW
An inactive gas commonly used as shielding. _____ is much heavier than air, so it
effectively shields the weld area. - ️️argon
A welding machine that maintains a constant voltage setting while compensating for
changes in amperage. - ️️constant voltage welder
A measurement that indicates...
Dr. Muller Advanced Welding GMAW -
An inactive gas commonly used as shielding. _____ is much heavier than air, so it
effectively shields the weld area. - ✔️✔️argon
A welding machine that maintains a constant voltage setting while compensating for
changes in amperage. - ✔️✔️constant voltage welder
A measurement that indicates the amount of current flowing in a circuit, which is
measured in amperes. GMAW _____ is determined by wire speed. - ✔️✔️amperage
A gas that reacts with other elements. GMAW uses both active and inactive gas as
shielding. - ✔️✔️active gas
The non-profit society that regulates the industrial standards for welding and promotes
the welding industry. - ✔️✔️American Welding Society
Globular transfer - ✔️✔️You can use this GMAW mode on thin materials with low
current
wire feed or wire melting rate - ✔️✔️This is measured in inches per minute or
poundage per hour
An active gas commonly used as shielding for GMAW. ____ ______is inexpensive but
yields a violent arc. - ✔️✔️carbon dioxide
cast - ✔️✔️The _______ is the natural bend in the wire
A steel that consists of iron and carbon, without any additional materials. - ✔️✔️carbon
steel
stickout - ✔️✔️Distance from the tube to the arc measured along the wire length is the
___________
This is adjusted so that the reel stops when the feed stops - ✔️✔️spool drag
one of the most important characteristics of a shield gas - how much heavier than air -
✔️✔️Density
, An electrode that conducts electricity to the arc but also melts into the weld as a filler
metal. - ✔️✔️consumable electrode
voltage decrease as amperage increase - ✔️✔️slope
The device located inside the welding gun that conducts electricity to the electrode. The
_____ ___ is usually made of copper. - ✔️✔️contact tip
A metal's ability to resist attack by other elements and chemicals. - ✔️✔️corrosion
resistance
An undesirable depression in the weld bead. A _____ can cause cracking if it is not
properly filled. - ✔️✔️crater
The device that indicates the amount of shielding gas present in the gas cylinder. -
✔️✔️cylinder pressure gauge
A form of iron oxide created during the fabrication of steel - ✔️✔️mill scale
An abbreviation for direct current electrode positive. _____ is another way of expressing
direct current with reverse polarity. - ✔️✔️DCEP
is responsible for electrically charging the wire electrodes when MIG welding -
✔️✔️contact tube
Spray transfer is named for the spray of tiny molten droplets across the arc, similar to
spray coming out of a garden hose when the opening is restricted. Spray transfer
usually is smaller than the diameter of the wire and uses relatively high voltage and wire
feed speeds or amperage. Unlike short-circuit transfer, once the arc is established, it is
on at all times. This method produces very little spatter and is most often used on thick
metals in the flat and horizontal positions - ✔️✔️axial spray transfer mode
A material that removes oxygen from the molten weld puddle and arc. Oxygen can ruin
a weld bead. - ✔️✔️deoxidizer
In short-circuit transfer, the electrode touches the work and short circuits, causing the
metal to transfer as a result of the short. This happens at a rate of 20 to more than 200
times per second.
The advantage of the short-circuit transfer is its low energy. This method is normally
used on thin material ¼ inch or less, and for root passes on pipe with no backing. It can
be used to weld in all positions. - ✔️✔️Short-circuit transfer process
Globular transfer means the weld metal transfers across the arc in large droplets,
usually larger than the diameter of the electrode being used. This mode of transfer
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