SENSE Module 7 GTAW Questions and
Answers | Latest Version | 2024/2025 |
Correct & Verified
What is the primary purpose of the Gas Tungsten Arc Welding (GTAW) process?
✔✔ To produce high-quality, precise welds on thin materials using a non-consumable tungsten
electrode.
What is the advantage of using GTAW over other welding processes?
✔✔ It provides better control of the weld pool, allowing for cleaner, more accurate welds.
What is the role of the tungsten electrode in GTAW?
✔✔ The tungsten electrode conducts the electrical current to create the welding arc but does not
melt during the welding process.
What gases are typically used for shielding in GTAW?
✔✔ Argon and helium are commonly used to shield the weld from atmospheric contamination.
How is the heat generated in GTAW?
1
,✔✔ Heat is generated by the electrical arc between the tungsten electrode and the workpiece.
What is the most common type of tungsten electrode used in GTAW?
✔✔ Pure tungsten or tungsten alloyed with small amounts of other elements like thorium or
cerium.
Why is it important to use the correct tungsten electrode for GTAW?
✔✔ The right electrode ensures proper arc stability, better weld quality, and longer electrode
life.
What is the significance of controlling the torch angle in GTAW?
✔✔ Maintaining the correct torch angle ensures proper fusion, a consistent weld bead, and
minimizes defects.
What type of current is most commonly used in GTAW?
✔✔ Direct current (DC), although alternating current (AC) can also be used for welding
materials like aluminum.
2
, What is the difference between DCEN (Direct Current Electrode Negative) and DCEP (Direct
Current Electrode Positive) in GTAW?
✔✔ DCEN provides better heat control and penetration, while DCEP provides more heat at the
electrode for welding thicker materials.
Why is a foot pedal or fingertip control used in GTAW?
✔✔ It allows the welder to adjust the welding current for better control over the weld pool and
heat input.
What is the role of filler metal in GTAW?
✔✔ Filler metal is used to add material to the weld joint, improving the weld's strength and
appearance.
How is the filler rod added to the weld pool in GTAW?
✔✔ The filler rod is manually fed into the weld pool by the welder, usually at the leading edge
of the weld bead.
What type of material is most commonly welded using GTAW?
3
Answers | Latest Version | 2024/2025 |
Correct & Verified
What is the primary purpose of the Gas Tungsten Arc Welding (GTAW) process?
✔✔ To produce high-quality, precise welds on thin materials using a non-consumable tungsten
electrode.
What is the advantage of using GTAW over other welding processes?
✔✔ It provides better control of the weld pool, allowing for cleaner, more accurate welds.
What is the role of the tungsten electrode in GTAW?
✔✔ The tungsten electrode conducts the electrical current to create the welding arc but does not
melt during the welding process.
What gases are typically used for shielding in GTAW?
✔✔ Argon and helium are commonly used to shield the weld from atmospheric contamination.
How is the heat generated in GTAW?
1
,✔✔ Heat is generated by the electrical arc between the tungsten electrode and the workpiece.
What is the most common type of tungsten electrode used in GTAW?
✔✔ Pure tungsten or tungsten alloyed with small amounts of other elements like thorium or
cerium.
Why is it important to use the correct tungsten electrode for GTAW?
✔✔ The right electrode ensures proper arc stability, better weld quality, and longer electrode
life.
What is the significance of controlling the torch angle in GTAW?
✔✔ Maintaining the correct torch angle ensures proper fusion, a consistent weld bead, and
minimizes defects.
What type of current is most commonly used in GTAW?
✔✔ Direct current (DC), although alternating current (AC) can also be used for welding
materials like aluminum.
2
, What is the difference between DCEN (Direct Current Electrode Negative) and DCEP (Direct
Current Electrode Positive) in GTAW?
✔✔ DCEN provides better heat control and penetration, while DCEP provides more heat at the
electrode for welding thicker materials.
Why is a foot pedal or fingertip control used in GTAW?
✔✔ It allows the welder to adjust the welding current for better control over the weld pool and
heat input.
What is the role of filler metal in GTAW?
✔✔ Filler metal is used to add material to the weld joint, improving the weld's strength and
appearance.
How is the filler rod added to the weld pool in GTAW?
✔✔ The filler rod is manually fed into the weld pool by the welder, usually at the leading edge
of the weld bead.
What type of material is most commonly welded using GTAW?
3
