Which of the following methods is used to start a TIG arc without touching base metal ?
- ️️High frequency start
How long should post purge be allowed to flow after welding arc is broken ? -
️️Long enough for base metal and electrode to cool
When using TIG to weld aluminum with AC the t...
TIG Welding final exam
Which of the following methods is used to start a TIG arc without touching base metal ?
- ✔️✔️High frequency start
How long should post purge be allowed to flow after welding arc is broken ? -
✔️✔️Long enough for base metal and electrode to cool
When using TIG to weld aluminum with AC the tip of tungsten electrode should be ? -
✔️✔️Rounded at tip
High frequency is added to alternated current to ? - ✔️✔️Maintain the arc
If tungsten splitting occurs what may be done to solve the problem ? - ✔️✔️All of the
above
EWT+1-2 electrode is ? - ✔️✔️Thoriated
Chemical symbol for tungsten ? - ✔️✔️W
When GTAW power source is set to DCEP ? - ✔️✔️Most of heat is on electrode
TIG is common referred to tungsten inert gas or helio-arc welding - ✔️✔️True
You must always use fuller metal with TIG process ? - ✔️✔️False
As a general rule, inside of diameter of gas nozzle should be ? - ✔️✔️3x electrode
diameter
Filler metal er4043 is used to weld ? - ✔️✔️Aluminum
Shielding has most commonly used in TIG is ? - ✔️✔️Argon
AC is used for aluminum welding because ? - ✔️✔️Cleaning action
GTAW produces no spatter and requires minimum cleaning - ✔️✔️
TIG good for high quality and variety of metals - ✔️✔️True
EWP indicates pure tungsten - ✔️✔️True
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