GMAW Maintenance & Troubleshooting

Which of the following is the correct placement for a power source to prevent overheating?

• In a closed, cluttered area

• In a well-ventilated, uncluttered area

• Near water sources

• Under a table

Who should install power sources according to electrical safety guidelines?

• Any worker

• Only qualified electricians

• Supervisors

• Welders

For accurate gas flow readings, the flowmeter must be positioned _________

• vertical

• horizontal

• diagonal

• upside down

To prevent resistance buildup and overheating, what should be done to cable connections?

• Tighten all fittings

• Loosen all fittings

• Cover with insulation tape only

• Paint the connections

Drive rolls must match wire type/size. For FCAW, the drive rolls should be:

• Smooth

• Knurled

• U-grooved

• Vee-grooved

Tension adjustment on drive rolls should allow the wire to feed ________ deforming it.

• without

• by

• after

• before

What are symptoms of wear in a conduit liner?

• Erratic feeding, arc hunting

• Increased wire speed, smooth arc

• Consistent feeding, stable arc

• Reduced spatter, improved weld quality

What is a sign of a worn contact tip?

• Oval-shaped orifice, arcing inside tip

• Bright blue flame at the tip

• Contact tip remains cool during welding

• Increased wire feed speed

What is the likely cause of birdnesting in welding feed problems?

• Dirty liner, kinked cable

• Low shielding gas flow

• Incorrect welding polarity

• Excessive arc length

What are the causes of porosity in gas coverage issues?

• Clogged nozzle, leaks, incorrect flow rate

• Excessive cooling, high humidity, low voltage

• Improper electrode angle, slow travel speed, thick base metal

• Overheating, undercut, excessive spatter