General Knowledge
What fuel gas will we use?
Acetylene
What is a flashback?
Recession of flame through the torch and into the hose
The red hose is for __________________ and the threads are _____________ handed.
Acetylene; left handed
What type of flame is this?
Carbonizing
Good Weld
Why will we use that fuel gas?
Hottest flame you can get
What is the role of a check valve and flashback arrestor?
Prevent flashbacks
The green hose is for __________________ and the threads are ______________.
Oxygen; right handed
What type of flame is this?
Neutral
Weld Bead B: Describe it
Torch too hot
Describe how cylinders should be stored? 3 things
Upright
Chained or strapped
With the safety cap on
What causes a backfire (or popping) in the torch?
Dirty tip
Too close to work
The acetylene cylinder valve should only be open _______ turn because _____________________.
¼; easier to turn off in an emergency
What type of flame is this?
Oxidizing
Weld Bead C: Describe it
What is the function of the torch?
Control and mix oxygen and fuel gases
Direct flame to welding area
How can you avoid flashbacks?
- Keeping equipment in good condition
- Inspecting equipment
- Keeping torch away from the metal
Weld Bead D: Describe it
Torch Slow
A _________________ _________________ is the tool used to light the torch.
Flint Striker
Weld Bead E: Describe it
Torch Fast