TIG Welding Basics
On a Sinusoidal wave the center represents zero (no current) the top and bottom of top
and bottom of the wave represent what respectively? - ✔️✔️The top half is DCEP and
the bottom is DCEN
What does the positive cycle provide when welding aluminum? - ✔️✔️Provides
Cleaning Action
Some medium range TIG welders will offer this start method which is less likely to
contaminate or brake the electrode? - ✔️✔️Lift Start
What current is used for TIG welding mild steel? - ✔️✔️DCEN
What primarily used for current is used for stick welding steel? - ✔️✔️DCEP
What is the approximate temperature of the arc measured in the center? - ✔️✔️10,000
Degrees
What current is used to TIG weld aluminum? - ✔️✔️AC
What temperature does pure tungsten melt at? - ✔️✔️6280 degrees
What is the temperature of the work when using DCEN? - ✔️✔️7,000 degrees
What is the temperature of the electrode when using DCEN? - ✔️✔️3,000 degrees
Why do TIG machines have an DCEP option? - ✔️✔️So they can Stick weld (SMAW)
What type of start do the newer machines in the shop have? - ✔️✔️High Frequency
Start
All DC stick welders can be used to TIG weld. What type of start will they use? -
✔️✔️Scratch Start
List three positives to using Aluminum for a project. - ✔️✔️Light weight, high thermal
conductivity, Aluminum oxide creates a protective barrier on it.
Square wave machines provide the ability to create an asymmetrical wave. What does
that mean? - ✔️✔️You can adjust the wave to spend more time either positive or
negative.
A more positive wave will result in increased what? - ✔️✔️Cleaning Action
On a Sinusoidal wave the center represents zero (no current) the top and bottom of top
and bottom of the wave represent what respectively? - ✔️✔️The top half is DCEP and
the bottom is DCEN
What does the positive cycle provide when welding aluminum? - ✔️✔️Provides
Cleaning Action
Some medium range TIG welders will offer this start method which is less likely to
contaminate or brake the electrode? - ✔️✔️Lift Start
What current is used for TIG welding mild steel? - ✔️✔️DCEN
What primarily used for current is used for stick welding steel? - ✔️✔️DCEP
What is the approximate temperature of the arc measured in the center? - ✔️✔️10,000
Degrees
What current is used to TIG weld aluminum? - ✔️✔️AC
What temperature does pure tungsten melt at? - ✔️✔️6280 degrees
What is the temperature of the work when using DCEN? - ✔️✔️7,000 degrees
What is the temperature of the electrode when using DCEN? - ✔️✔️3,000 degrees
Why do TIG machines have an DCEP option? - ✔️✔️So they can Stick weld (SMAW)
What type of start do the newer machines in the shop have? - ✔️✔️High Frequency
Start
All DC stick welders can be used to TIG weld. What type of start will they use? -
✔️✔️Scratch Start
List three positives to using Aluminum for a project. - ✔️✔️Light weight, high thermal
conductivity, Aluminum oxide creates a protective barrier on it.
Square wave machines provide the ability to create an asymmetrical wave. What does
that mean? - ✔️✔️You can adjust the wave to spend more time either positive or
negative.
A more positive wave will result in increased what? - ✔️✔️Cleaning Action
