Bundled Final Exams: Welding Questions and Answers| Verified 2025
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Course
Welding
Institution
Welding
This document covers various important aspects of welding techniques, such as adjusting amperage, the role of filler rods in TIG welding, and the concept of arc length. It discusses the necessity of using the correct shielding gas in MIG welding to prevent contamination and the effect of high amper...
Bundled Final Exams: Welding
Questions and Answers| Verified 2025
What is the primary purpose of adjusting the amperage during a welding process?
To control the heat and penetration of the weld
When performing TIG welding, what is the main function of the filler rod?
To add material to the weld pool for stronger joints
What does the term "arc length" refer to in welding?
The distance between the tip of the electrode and the workpiece
Why is it important to use the correct shielding gas in MIG welding?
To prevent oxidation and contamination of the weld bead
What is the effect of high amperage on the weld pool in arc welding?
It creates a deeper penetration and larger weld pool
What happens when the welding torch is too close to the workpiece during TIG welding?
It can cause the electrode to overheat or melt
Which of the following is a common issue when using too little amperage for a welding job?
1
, The weld may lack penetration and appear cold and weak
What is the role of the flux in stick welding?
To protect the molten weld pool from atmospheric contamination
Which welding process is ideal for thin sheet metals due to its precise heat control?
TIG welding
What is the advantage of using a gas lens in TIG welding?
It provides a more stable arc and improved gas coverage
Why is it important to maintain a clean work surface before welding?
To prevent contamination of the weld pool and ensure a strong joint
How does the use of high voltage in MIG welding affect the welding process?
It increases the arc length and allows for higher heat input
What does "back purge" refer to in welding?
The practice of applying shielding gas to the back side of the weld to prevent contamination
Which welding process is most commonly used for welding stainless steel?
Gas Tungsten Arc Welding (GTAW or TIG)
2
,How does increasing the travel speed of the welding torch affect the weld bead?
It can lead to a narrower weld bead with less penetration
In what scenario would you use a low hydrogen electrode for stick welding?
When welding high-strength materials to prevent hydrogen embrittlement
Why is post-weld heat treatment sometimes necessary in welding?
To relieve residual stresses and improve the mechanical properties of the weld
What is the main cause of porosity in a weld bead?
Contamination of the weld pool by moisture or dirt
What is the advantage of using a push technique in MIG welding?
It gives better visibility of the weld and helps produce a cleaner bead
When should a welder adjust the wire feed speed in MIG welding?
When trying to balance the heat input and achieve optimal weld quality
What is the main purpose of using a spool gun in MIG welding?
To feed aluminum wire efficiently and prevent it from jamming
3
, What is the typical use of flux-cored arc welding (FCAW)?
For welding thicker materials or in outdoor environments where wind may affect shielding
gas
How does the electrode diameter affect the welding process?
Larger electrodes are used for thicker materials, while smaller electrodes are better for thin
metals
What does "bead geometry" refer to in welding?
The shape, size, and appearance of the weld bead
Why should a welder inspect their equipment before starting a job?
To ensure safety and avoid equipment malfunctions during welding
How does heat input affect the cooling rate of a weld?
Higher heat input results in a slower cooling rate, which can affect the mechanical properties
of the weld
What is the purpose of a back weld in welding applications?
To reinforce the joint and prevent potential failure at critical points
Why is it important to choose the right welding electrode for the job?
4
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