FCAW Quizzes and solutions graded A

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________________. - 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. - 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 These alloying elements can be added to the flux to improve hardness, strength, creep resistance, And corrosion resistance. - Carbon, chromium, and vanadium. These alloying elements help remove oxides and/or nitride in the weld. - Aluminum, silicon, and titanium