Welding Flashcards
What do you need to protect your eyes from when welding?
Light rays, Ultraviolet light rays , Infrared light rays
Heat rays
Sparks
Slag
What are the different welding lenses used for?
9: 10: 11: 12: 14:
9: low amperage
10: low medium amperage
11: medium amperage
12: medium to high amperage and gouging
14: high amperage heavy welding and gouging
When your eyes have been exposed to ultraviolet rays what is it called_______?
Arc flash
What is a typical symptom of arc flash?
Feels like sand in the eyes
Do not repair splices with in _________feet of the cable holder?
10 feet
3 meters
When welding where is the best place to put the ground clamp?
As close to where you are welding as possible
What happens in constant amperage machines?
SMAW
Maintains the set amperage and varies the voltage.
What happens in Constant voltage machines?
GMAW
Maintains voltage and varies the amperage
What are the three types of constant currents power sources?
Transformers
Inverters
Generators
What is duty cycle?
Duty cycle is a rating based on percentage. And is based on 10 min.
So for example 60% duty cycle you can weld on max for 6 minutes then machine has to cool for 4 minutes
What is arc blow?
A condition often encountered where dc welding has been done at high heats.
The electrical component that causes current (amperage) to flow in a conductor or to cross a gap, as occurs in in arc welding. _______ in arc welding are responsible for starting and maintaining the arc of the puddle fluidity and flow.
Voltage
________ in arc welding is responsible for the metal disposition rate and penetration.
Amperage
If the arc length is increased there is a decrease in what?
Decrease in amperage
Straight polarity is known as electrode ___________ ?
Negative
