Oxy.-Acetylene Welding

Oxyfuel welding uses oxygen and what other gas?

• actylene
• argon
• arbinite 
• helium 

What polarity does oxyfuel welding utilize? 

• DC+
• AC
• No Current 
• Single phase current 

why is acetylene the only fuel gas that can be used for welding? 

• it's the only gas with enough force to weld 
• it's the only gas that burns hot enough for welding 
• its the only gas that can be burned safety 
• its the only gas stable enough for welding 

what is the recommended filter shade lens needed for oxy acetylene welding? 

• 10
• 7
• 8
• 5

what color are acetylene fuel hoses? 

• black 
• green 
• red 
• brass 

what is the proper ratio of oxygen to acetylene when doing oxy fuel welding? 

• 2:1 
• 5:10 
• 1:2
• 1/4 turn 

which gas must be opened first when O/A welding? 

• Acetylene 
• Oxygen 
• Air 
• gas 

the green hose in O/A welding is always connected to what? 

• oxygen 
• fuel 
• acetylene 
• air 

acetylene gas is unstable, this means it? 

• can self combust
• burns well underwater 
• don't ever move the gas cylinder 
• don't light fuel off acetylene ever

acetylene gas can self combust when it reaches what pressure? 

• 5 psi 
• 10 psi 
• 15 psi 
• 15 cfh