Chapter One Quiz Flashcards
The purpose of brazing flux is?
Remove oxides and reduce the surface tension of the molten filler.
The welding current in GMAW is determined by what variables?
Wire feed speed.
What defect can occur when using high current DCEP for the SAW process?
Solidification cracking.
Arc force control in CC welding power is used to what in SMAW?
Increase penetration of the weld when the arc length decreases.
What two areas represent largest voltage drop in a welding arc?
Cathode and anode drop zone.
Majority of the arc energy is transferred to the work when the GTAW is operated in what polarity?
DCEN
What is the most arc efficient welding process?
SAW
Pinch force aids in droplet detachment during spray transfer how?
Self induced magnetic field.
Submerged arc welding process incorporates what?
A continuous fed solid wire and a constant voltage power source with the arc covered by flux.
Keyhole plasma on 6mm thick material has a current range greater than what in the PAW process?
100A
Worm tracks produced using FCAW can be avoided by what?
Decreasing current and voltage.
Twin wire in SAW involves?
One wire feeder with two wires and one DC power source.
Arc plasma consists of?
Free electrons and positive ions.
Main controlled variables in RSW are?
Electrode size, pressure, current, and time.
