GMAW Flashcards
(48 cards)
What’s GMAW stand for
Gas metal arc welding
What shade of lens should you use when welding
Dark as possible that’s comfortable but no less then the recommended shade
Eyes should be protected from what
Ultraviolet, radiant energy
Face and body should be protected why
Radiation from reflection from surfaces can cause sunburn effects to the skin that’s exposed
Should earplugs be worn
When you’re working at high noise levels
What protective clothing is preferred?
Dark collared denim clothing
Extreme caution should be taken when welding metals that contain zinc why?
Can cause toxicity
What are three metal transfer methods?
Short circuit
Globular transfer
Spray arc
Sheet metal uses which method of welding
Short circuit
When wire speed is increased what also needs to be increased
Heat
What will happen if voltage is too high and wire is too low
will burn back
sputtering weld
Once machine is set to recommend a charts, what must be done to ensure set up
Test piece
What’s the benefits of flux cord welding?
All positions are capable
Quality
Minimum skill
Each type of shilling and gas can affect the world characteristics in what way
The depth of fusion
Welding bead
Welding speed
What is the primary purpose of shielding gas?
Prevent mould metals from absorbing elements, such as oxygen and nitrogen from atmospheric air
List some considerations when selecting shielding gas
Base metal
Filler metal
Welding process
Width and depth
Joint design
Can argon gas cause suffocation
Yes
Carbon dioxide can act as a asphyxia
True
CO2 is the cheapest gas available
True
When oxygen is added to shielding gas, it could help with puddle fluidity
Yes
Argon has a high or low thermal conductivity
Lower
Helium has a higher or lower thermal conductivity
Higher
Hydrogen is the smallest known element and highly combustible, true or false
True
Nitrogen is considered an insert gas, true or false
True
