Block 6: MIG Welding Exam Questions
and Answers 100% Pass
How is fusion achieved? - ✔✔Generating an electric arc between the consumable filler
metal electrode and the work piece
What polarity gives better penetration? - ✔✔DCRP (CAN BE USED TO WELD ALL
METALS)
Recommended types of machines for MIG welding? - ✔✔Rectifier or Motor Generator
What are the normal AMP limits for all position welding? - ✔✔200- 250 AMPS for all
position welding
What polarity is used for optimum efficiency? - ✔✔DCRP
What generates the welding heat? - ✔✔Current flowing through the gap between the
electrode and the work generates the welding heat
To produce a uniform weld, what needs to be maintained? - ✔✔Welding voltage and
arch length
When is a push gun used? - ✔✔When welding with hard wires and where current often
exceeds 250 AMPS
What determines the selection of wire size diameter? - ✔✔Type of metal, Metal
thickness, and the position in which the welding can be done
COPYRIGHT © 2025 BY KATELYN WHITMAN, ALL RIGHTS RESERVED 1
, What type of welding requires smaller diameter wires? - ✔✔Vertical and overhead
What are the basic wire diameters? - ✔✔0.020",0.030",0.035" (Used for thin metals of low
and medium carbon steels)
0.045" and 1/16" (Also part of the basic wire diameters) is used for what? - ✔✔Medium
thickness metals
1/8" is used for what metals? - ✔✔Thicker metals
Wire stick out should measure how far for most applications? - ✔✔3/8"-3/4"
What are the SIX inert gasses? - ✔✔Argon, Helium, Neon, Krypton, Xenon, Radon.
What gas creates a stable, quiet welding arc? - ✔✔ARGON (not used when welding
steel)
What gasses can Argon be used with? - ✔✔Oxygen, Carbon Dioxide, Helium or with
Carbon Dioxide and Helium together
What causes lower power in the arc and lower penetration? - ✔✔Using Argon with
other gasses
Helium is used for what metals? - ✔✔Non-Ferrous
What is the gas flow rate for most welding conditions? - ✔✔35 Cubic feet per hour
What must you do before starting any maintenance? - ✔✔Disconnect the power
This aids in the penetration and control of the weld reinforcement? - ✔✔Edge Prep.
What materials are used for weld backing? - ✔✔Copper blocks, strips and bars, carbon
block or fired clay
Where should you keep the wire when welding? - ✔✔At the leading edge of the puddle
COPYRIGHT © 2025 BY KATELYN WHITMAN, ALL RIGHTS RESERVED 2
and Answers 100% Pass
How is fusion achieved? - ✔✔Generating an electric arc between the consumable filler
metal electrode and the work piece
What polarity gives better penetration? - ✔✔DCRP (CAN BE USED TO WELD ALL
METALS)
Recommended types of machines for MIG welding? - ✔✔Rectifier or Motor Generator
What are the normal AMP limits for all position welding? - ✔✔200- 250 AMPS for all
position welding
What polarity is used for optimum efficiency? - ✔✔DCRP
What generates the welding heat? - ✔✔Current flowing through the gap between the
electrode and the work generates the welding heat
To produce a uniform weld, what needs to be maintained? - ✔✔Welding voltage and
arch length
When is a push gun used? - ✔✔When welding with hard wires and where current often
exceeds 250 AMPS
What determines the selection of wire size diameter? - ✔✔Type of metal, Metal
thickness, and the position in which the welding can be done
COPYRIGHT © 2025 BY KATELYN WHITMAN, ALL RIGHTS RESERVED 1
, What type of welding requires smaller diameter wires? - ✔✔Vertical and overhead
What are the basic wire diameters? - ✔✔0.020",0.030",0.035" (Used for thin metals of low
and medium carbon steels)
0.045" and 1/16" (Also part of the basic wire diameters) is used for what? - ✔✔Medium
thickness metals
1/8" is used for what metals? - ✔✔Thicker metals
Wire stick out should measure how far for most applications? - ✔✔3/8"-3/4"
What are the SIX inert gasses? - ✔✔Argon, Helium, Neon, Krypton, Xenon, Radon.
What gas creates a stable, quiet welding arc? - ✔✔ARGON (not used when welding
steel)
What gasses can Argon be used with? - ✔✔Oxygen, Carbon Dioxide, Helium or with
Carbon Dioxide and Helium together
What causes lower power in the arc and lower penetration? - ✔✔Using Argon with
other gasses
Helium is used for what metals? - ✔✔Non-Ferrous
What is the gas flow rate for most welding conditions? - ✔✔35 Cubic feet per hour
What must you do before starting any maintenance? - ✔✔Disconnect the power
This aids in the penetration and control of the weld reinforcement? - ✔✔Edge Prep.
What materials are used for weld backing? - ✔✔Copper blocks, strips and bars, carbon
block or fired clay
Where should you keep the wire when welding? - ✔✔At the leading edge of the puddle
COPYRIGHT © 2025 BY KATELYN WHITMAN, ALL RIGHTS RESERVED 2
