- How open do you want the oxygen tank to be?
Open the valve all the way and back seat it. Turn on slowly so the regulator does not explode.
- What are the welding positions?
1G = FLAT 2G = HORIZONTAL 3G = VERTICAL 4G = OVER HEAD
- What types of electricity operate on welding rod?
A/C and D/C
- What are the three component of Arc Welding machine?
Ground clamp
Electrode Clamp
Welding Rods (Electrodes)
- What are the four types of Welding?
SMAW/ shielded metal arc welding (stick welding)
MIG / Metal inert gas welding AKA GMAW
FCAW / Flux core arc welding
TIG / Tungsten arc welding
- How are MIG Electrode types labeled?
It is manufactures standard code to identify types of electrode
ER- An electrode or filler rod that is used in either a wire feed or TIG welding.
70- A minimum of 70,000 pounds of tensile strength per square inch of weld.
S -Solid wire.
6- The amount of deoxidizing agent and cleansing agent on the electrode.
- What is MIG welding wire size range?
.023
.030
.035
.045
- What are the three things a MIG welder requires?
Electricity to produce heat
An electrode to fill the joint
Shielding gas to protect the weld from the air
- What is the most common wire used welding carbon steel?
ER 70S-6
- In oxygen acetylene cutting, what is the bigger tank?
Oxygen
- What is the last two digits on rod stand for?
It refers to, the flux or shielding on the rod. The higher the number the more shielding, flux, and or metal is deposited. A (XX11) has a lot less coating then a (XX24).
- What types of voltage and polarity type used in MIG?
D/C electrode positive
- What color are the acetylene hose and oxygen hose?
Acetylene pipe = Red
Oxygen pipe = Green
- What are the most common welding rods?
6010 6011 6013 7018 7024
- How is the strength of the weld indicated on the rod?
By the first two digits in the rod number
- What is MIG Welding?
MIG welding is most commonly used in fabrication shops where production is high, and the possibility of wind blowing away your gas shielding is unlikely. It is also known as Gas Metal Arc (GMA) or GMAW
- What are three common types of metals which are welded with a MIG welder?
Carbon steel.
Stainless steel.
Aluminum, with a special feeder because aluminum wire is very soft.
- What gases are used for MIG welding?
Argon
Carbon dioxide
Helium
- What are the disadvantage of using MIG?
Welder cannot be too far from machine Wind is a major factor outdoors Always need a bottle of gas It needs to be well maintained Contact tips seize up from spatter Require clean joint Very annoying to trouble shoot
- What are the advantage of using MIG?
Clean with very little smoke Cheap and fast production Excellent for spot and tack weld Long welds with less restarts Easy/low skill
- What is the name of the tool used to light the torch?
Torch striker
- What does the first two digits of the rod type stand for?
Tensile strength per square inch of weld. (60XX stands for a minimum of 60,000 pounds tensile strength per square inch of weld)
- What are the three welding techniques?
Whipping (Back and forth)
Circle
Weaving (Side to side)
What should you do before cutting with a torch?
Inspect the oxygen tank, the acetylene tank, and the hoses for damage. Conduct a leak check by pressurizing the hoses and watching the gauges to see if the pressure drops.
