Of the various types of tungsten electrodes available, the tungsten electrodes that are used for AC welding
are _____.
a. lanthanated
b. pure
c. irradiated
d. thoriated
Question 2
Setting the amperage at 200 amps for a welding machine that is rated 300 amps at 60-percent duty cycle will
_____.
a. reduce the shielding gas flow rate by 30 percent
b. cause excessive nozzle vibration
c. increase the duty cycle to 100 percent
d. allow welding current to be pulsed