Welding

Question 1

What color hose is for oxygen?

Answer 1

Green

Question 2

What color hose is for acetylene?

Answer 2

Red

Question 3

What are the welding processes?

Answer 3

• Shielded metal arc welding (SMAW)
• Metal inert gas welding (MIG)
• Flux core arc welding (FCAW)
• Gas tungsten arc welding (TIG / GTAW)

Question 4

What do the numbers for welding rods represent? For example, 6011.

Answer 4

• First two digits are tensile strength per square inch of weld (60 = 60,000 psi)
• Third digit is which position the weld works best in (1 is all positions, 2 is horizontal and flat only, 3 is flat only)
• Fourth digit is flux or shielding on the rod

Question 5

What are the three most common metals welded with a MIG welder?

Answer 5

Carbon steel
Stainless steel
Aluminum steel

Question 6

What is the most common wire used for welding carbon steel?

Answer 6

ER 70S-6

Question 7

What are the thicknesses of solid wire MIG welding electrodes?

Answer 7

0. 023
1. 030
2. 035
3. 045

Question 8

What gases are used for MIG welding?

Answer 8

• Argon (for aluminum)
• Carbon dioxide (for very thick steel)
• Helium (for aluminum but not as common as argon)

Question 9

What is the most common shielding gas mixture?

Answer 9

C-25

Question 10

What are the groove welding positions?

Answer 10

• 1G: flat position
• 2G: horizontal position
• 3G: vertical position
• 4G: overhead position