MIG Weld Study Guide Questions and Answers 100% Verified
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Course
MIG Weld Study
Institution
MIG Weld Study
After an arc is struck, what protects the molten puddle from contamination due to
elements in the air? - ️️Shielding Gas Cover
What are the three things that have to adjusted to be in balance on a MIG welding
machine? - ️️Voltage Control, Wire Feed Speed, and Shielding Gas Flow Rate.
Wh...
MIG Weld Study Guide
After an arc is struck, what protects the molten puddle from contamination due to
elements in the air? - ✔️✔️Shielding Gas Cover
What are the three things that have to adjusted to be in balance on a MIG welding
machine? - ✔️✔️Voltage Control, Wire Feed Speed, and Shielding Gas Flow Rate.
What does each digit of the electrode number stand for? - ✔️✔️E - electrode, R - rod,
First two digits - tensile strength (by 1000 pounds), S - solid bare wire, Last digits -
chemical composition variations of electrodes.
What does MIG welding stand for? - ✔️✔️Metal Inert Gas
List at least 3 advantages of MIG welding. - ✔️✔️Don't have to start an arc, no slag,
and no changing out electrodes.
Why is cleaning of a weld and prep time cut down with MIG welding? - ✔️✔️No slag
and no worrying about electrodes.
Are MIG welders alternating current (AC) or direct current (DC) machines? -
✔️✔️Direct Current (DC)
What does voltage affect with MIG welding? - ✔️✔️Voltage will change very little with
large changes in current.
What is burnback? - ✔️✔️A situation in which an electrode wire is fused to the contact
tip.
The MIG gun can also be thought of as an ______________ holder. - ✔️✔️electrode
What is an inert gas? - ✔️✔️A substance whose atoms are stable and will not react
easily with atoms of other elements.
What are the different types of gasses that can be used in MIG welding? - ✔️✔️Inert
and Non-Inert Gas
In MIG welding, what is the electrode? - ✔️✔️The Wire
What factors need to be considered when selecting electrode wire? - ✔️✔️Types of
Material to be welded, Joint Design, Surface Condition, and Service Requirements
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