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12. The device that pulls the electrode wire from a spool and pushes it through the gun cable and gun is known as a(n)

a. spool gun
b. closed-loop unit
C. push-pull extractor
d. wire feeder

13.The electrical connection between the welding current and the electrode wire is provided by the
a. nozzle
b. weld puddle
c. shielding gas
d. contact tip

14. To prevent contamination of the weld puddle, shielding gases are used to displace what from the
weld zone?
a. Dross
b. Argon
c. Atmosphere
d. Carbon deposits

15. Which of the following is a correct statement regarding the selection and/or connection of shielding- gas cylinders to the welding equipment?
a. The shielding gas selection is not important; all of the available gases do an equal job in all welding
applications.
b. Remove the cylinder's protective cap, momentarily crack the cylinder valve open to blow out any dirt, and then close it.
c. Install the regulator/flowmeter assembly first, then crack the cylinder valve open to blow out any dirt
and debris.
d. When using argon as a shielding gas, special precautions and respirators are required due to its
toxicity.

16. If a spool of welding wire meets specifications, but does not include a record of chemical composition or strength, it is assumed that the wire is intended for
a. rigid control fabrication
b. private use only
c. critical use
d. general use

1 answer

Here are the answers to your questions:

  1. The device that pulls the electrode wire from a spool and pushes it through the gun cable and gun is known as a(n)
    d. wire feeder

  2. The electrical connection between the welding current and the electrode wire is provided by the
    d. contact tip

  3. To prevent contamination of the weld puddle, shielding gases are used to displace what from the weld zone?
    c. Atmosphere

  4. Which of the following is a correct statement regarding the selection and/or connection of shielding-gas cylinders to the welding equipment?
    b. Remove the cylinder's protective cap, momentarily crack the cylinder valve open to blow out any dirt, and then close it.

  5. If a spool of welding wire meets specifications, but does not include a record of chemical composition or strength, it is assumed that the wire is intended for
    d. general use