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1. In GMAW, the shielding for the molten metal is accomplished through the use of:
a) granular flux
b) inert and reactive gases
c) reactive gases only
d) inert gases only
2. GMAW is the abbreviation for:
a) Gas Machine Arc Welding
b) Gas Method Arc Welding
c) Gas Material Arc Welding
d) Gas Metal Arc Welding
3. In GMAW, insufficient gas flow can cause:
a) Undercut
b) Overlap
c) Porosity
d) Hydrogen cracking
4. A worn contact tube results in:
a) poor arc starts
b) ropey welds
c) excessive spatter
d) porosity
, 5. The benefit of copper coated electrode wires is:
a) better arc starts
b) increased contact tip life
c) improved wire feeding
d) all of the above
6. What type of power source is used for GMAW?
a) Constant Current
b) Alternating Current
c) Variable Voltage
d) Constant Voltage
7. In GMAW, which type of metal transfer is restricted to flat position and horizontal fillet
welds?
a) Pulsed Transfer
b) Short Circuiting Transfer
c) Spray Transfer
d) Surface Tension Transfer
8. What type of electrode wire is used with GMAW?
a) Flux cored
b) Solid
c) Tubular
d) None of the above
9. In GMAW, the amperage is controlled by adjusting the:
a) voltage
b) wire feed speed
c) wattage
d) arc length