MIG Welding
Metal Inert Gas - Answer-Is an arc welding process that uses an arc between a continuous filler metal
electrode and the weld pool.
Fusion - Answer-This is achieved by generating and electric arc between the consumable filler metal
electrode and the work piece.
Fusion requires what type of of power supply unit? - Answer-It requires a power supply unit that
produces Direct Current Straight Polarity (DCSP) or Direct Current Reverse Polarity(DCRP)
This polarity is used for almost all applications of gas metal arc welding, it give better penetration, and
can be used to well all metals. - Answer-DCRP Direct Current Reverse Polarity
What is the MIG Welding Processs - Answer-A process that uses a consumable, continuously fed filler
metal electrode.
,The filler metal electrode is commonly referred to as what? - Answer-Filler Wire
What carries the current from the power supply unit to the base metal? - Answer-Filler Metal Electrode
What forms between the electrode and base metal? - Answer-Electric Arc
This is produced by transfer of the filler metal to the base metal. - Answer-The bead.
What shields the arc and weld? - Answer-Gas, or mixture of gasses
What will you want to protect the leads of the welding machine from? - Answer-Sparks or Damage.
What are the recommended type of machine for MIG welding? - Answer-Rectifier or Motor Generator
MIG welding machines should have what type of voltage characteristics ? - Answer-Constant Voltage
(Potential)
MIG welding machines supply what type of current? - Answer-Direct Current
What are the normal amps limits for MIG welding machines? - Answer-200 - 250 amps for all position
welding
What must maintain a constant value to produce a uniform weld? - Answer-Welding voltage and arc
length.
This type of machine is NOT Recommended for MIG welding? - Answer-Constant Current
, What type of welding machine is recommended for MIG? - Answer-Constant Potential
What are the two basic controls for Constant Potential Welding machines? - Answer-Voltage rheostat
and wire feed rheostat.
The wire feeding mechanism usually include what that energizes the gas flow. - Answer-Welding Power
Contactor and a Solenoid
What has drive rollers located inside the gun that actually pulls the welding wire from the wire feeder? -
Answer-Pull Gun
A Pull Gun is used on what size wire and type wire? - Answer-Small diameter and soft wire such as
aluminum and magnesium.
What type of gun has wire that is pushed to the gun by drive rollers in the wire feeding mechanism? -
Answer-Push Gun
A Push Gun can handle what size wire and type wire? - Answer-Heavier diameter and hard wire such as
carbon and stainless steel.
A Push Gun is used to weld with hard wires and where currents often exceed ___________ amps. -
Answer-250 amps
Both a Pull Gun and Push Gun are equipped with this items? - Answer-Trigger Switch
Some equipment will have a timer that permits the shielding gas to flow for a predetermined time for
what purpose? - Answer-To Protect the weld until is solidifies
Metal Inert Gas - Answer-Is an arc welding process that uses an arc between a continuous filler metal
electrode and the weld pool.
Fusion - Answer-This is achieved by generating and electric arc between the consumable filler metal
electrode and the work piece.
Fusion requires what type of of power supply unit? - Answer-It requires a power supply unit that
produces Direct Current Straight Polarity (DCSP) or Direct Current Reverse Polarity(DCRP)
This polarity is used for almost all applications of gas metal arc welding, it give better penetration, and
can be used to well all metals. - Answer-DCRP Direct Current Reverse Polarity
What is the MIG Welding Processs - Answer-A process that uses a consumable, continuously fed filler
metal electrode.
,The filler metal electrode is commonly referred to as what? - Answer-Filler Wire
What carries the current from the power supply unit to the base metal? - Answer-Filler Metal Electrode
What forms between the electrode and base metal? - Answer-Electric Arc
This is produced by transfer of the filler metal to the base metal. - Answer-The bead.
What shields the arc and weld? - Answer-Gas, or mixture of gasses
What will you want to protect the leads of the welding machine from? - Answer-Sparks or Damage.
What are the recommended type of machine for MIG welding? - Answer-Rectifier or Motor Generator
MIG welding machines should have what type of voltage characteristics ? - Answer-Constant Voltage
(Potential)
MIG welding machines supply what type of current? - Answer-Direct Current
What are the normal amps limits for MIG welding machines? - Answer-200 - 250 amps for all position
welding
What must maintain a constant value to produce a uniform weld? - Answer-Welding voltage and arc
length.
This type of machine is NOT Recommended for MIG welding? - Answer-Constant Current
, What type of welding machine is recommended for MIG? - Answer-Constant Potential
What are the two basic controls for Constant Potential Welding machines? - Answer-Voltage rheostat
and wire feed rheostat.
The wire feeding mechanism usually include what that energizes the gas flow. - Answer-Welding Power
Contactor and a Solenoid
What has drive rollers located inside the gun that actually pulls the welding wire from the wire feeder? -
Answer-Pull Gun
A Pull Gun is used on what size wire and type wire? - Answer-Small diameter and soft wire such as
aluminum and magnesium.
What type of gun has wire that is pushed to the gun by drive rollers in the wire feeding mechanism? -
Answer-Push Gun
A Push Gun can handle what size wire and type wire? - Answer-Heavier diameter and hard wire such as
carbon and stainless steel.
A Push Gun is used to weld with hard wires and where currents often exceed ___________ amps. -
Answer-250 amps
Both a Pull Gun and Push Gun are equipped with this items? - Answer-Trigger Switch
Some equipment will have a timer that permits the shielding gas to flow for a predetermined time for
what purpose? - Answer-To Protect the weld until is solidifies
