Day 1 Outside Work: Welding and Procedure Flashcards
What is the primary function of shielding gas in arc welding processes?
To protect the weld puddle from atmospheric contamination
What is the function of the pressure regulator in welding equipment?
To control the gas pressure to the desired level
What is the main reason for using helium in welding processes?
Its chemical inertness and low reactivity
How does the keyhole technique in plasma welding benefit the welding process?
It provides deeper and narrower penetration
Why should a weld never be filed down to improve its appearance?
It can weaken the structural integrity of the weld
What is the typical consequence of excessive fluidity of molten metal during welding?
The metal tends to sag
Which gas is typically used for the outer envelope when brazing aluminum with acetylene?
Hydrogen
Which factor is most critical when selecting a welding tip size?
The amount of heat it directs onto the metal
In terms of arc positioning, what is advised when welding in a vertical position to control the flow of molten metal?
Adjust the current settings
Which is an incorrect method to check for gas leaks in welding equipment?
Using a flame
Why is it important to ensure the proper machine setup and adjustment in welding?
To achieve the desired quality of the weld
How does the coefficient of linear expansion affect the welding process?
It causes dimensional changes in the metal due to heat
Why is a soft flame used in silver soldering?
To prevent overheating of the base metal
What is the disadvantage of the MIG welding process for repair work?
Weld quality is difficult to determine without testing
What is the primary challenge when welding in an overhead position?
Managing the flow of molten metal due to gravity
What role does the plasma cutter play in welding?
It cuts through metal with precision
What does the presence of porosity in a weld indicate?
Improper shielding gas coverage
What aspect of the welding process does the coefficient of linear expansion primarily affect?
Dimensional changes due to temperature
What is the main challenge faced by beginners in striking an arc in SMAW?
Electrode sticking to the work
Which of the following is a key characteristic of a properly executed weld seam?
It has uniform thickness and even spacing of ripples
How does uneven heating affect the welded joint?
It leads to stress and possible deformation
What characterizes a good weld bead on a flat plate?
Good penetration into the base metal
What is the significance of having a good view of the weld puddle?
To ensure the welding is kept within the joint
What happens if the electrode in SMAW is not withdrawn quickly enough after touching the base metal?
The electrode sticks to the work
Which welding process was originally developed for welding magnesium in the Northrop XP-56 flying wing?
TIG Welding
