FCAW Questions and Correct Answers |
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What is the abbreviation on the FCAW process where atmospheric shielding can be provided
completely by the flux material located inside the wire.
FCAW-S
What is the abbreviation for a Flux Core Wire that requires shielding gas?
FCAW-G
Between FCAW-S and FCAW-G, Which of the two is more portable?
FCAW-S (no gas cylinder required)
FCAW represented about __________% of the total amount of welding done in 2005.
50%
By having an external shielding gas, FCAW-G electrodes can have more__________.
More alloying elements and fluxing agents
Guns equipped with electron it controls can allow the welder to________________.
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Remotely adjust welding parameters
FCAW machines use what kind of power source?
Constant-potential / Constant-voltage
The arc voltage directly affects the ________.
arc length
Increasing the voltage automatically ____________.
Increases the arc length
Decreasing the voltage automatically___________.
shortens the arc length
Because the arc voltage remains constant, changes in the wire feed speed will automatically
cause a change in the amperage to _____________.
Keep the voltage constant
On a constant potential welding machine, how much of the machines maximum amperage is
always available.
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100% is always available
The CP welding machine's _______________ to whatever level is needed to maintain the
same arc length.
Amperage naturally increases
On a FCAW machine how is amperage increased?
Increasing wire feed speed.
The flux inside the electrode provides the molten world pool with protection from the
______________.
atmosphere
The flux inside the electrode also improves _____________ through chemical reactions and
alloys, and improves the weld shape.
strength
The major atmospheric contaminants come from:
Oxygen and Nitrogen
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