Welding

Question 1

What must you inspect before oxy acetylene cutting begins?

Answer 1

• oxygen tank
• acetylene tank
• hoses for obvious damage

Question 2

How do you conduct a leak check?

Answer 2

Pressurizing the hoses and watching the gauges for a drop in pressure(do not check with a lighter).

Question 3

What valves need to be off?

Answer 3

The main valves and the torch valves. Regulator pressure adjusting screws need to be backed out with no pressure on gauges.

Question 4

Where do you stand when turning on the oxygen cylinder valve?

Answer 4

To the side not facing the regulator.

Question 5

Where do you stand when turning on the acetylene/fuel gas cylinder valve?

Answer 5

To the side opening it 1/2-3/4 turn

Question 6

What are the steps to lighting the torch?

Answer 6

• open acetylene valve 1/8-1/4 turn(not opening causes black floaters).
• use torch striker
• open valve until smoke goes away and flame doesn’t jump from tip.
• open oxygen torch until inner cones are defined(known as neutral flame)

Question 7

What are the basic welding processes?

Answer 7

• SMAW
• MIG
• FCAW
• TIG

Question 8

SMAW

Answer 8

Shielded Metal Arc Welding(Stick Welding)

Question 9

MIG

Answer 9

Metal Inert Gas welding

Question 10

FCAW

Answer 10

Flux Core Arc Welding

Question 11

TIG

Answer 11

Tungsten Arc welding

Question 12

What are Arc Welding machines made up of?

Answer 12

• Ground Clamp
• Electrode Clamp
• Welding Rods(electrodes)

Question 13

What are the types of welding rods?

Answer 13

6010
6011
6013
7018
7024

Question 14

What do the numbers for welding rods signify?

Answer 14

• First 2 digits are for minimum of 10,000x number in pounds of tensile strength per sq. in.
• Last 2 digits are for the flux/shielding on a rod. Higher number means more shielding, flux, and/or metal that’s deposited.

Question 15

What are the steps in setting up a welding machine?

Answer 15

• Select your rod
• Set the polarity
• Set machine to amperage range

Question 16

What do MIG welders consist of?

Answer 16

Handle w/ trigger controlling wire feed.

Question 17

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

Answer 17

Carbon steel, stainless steel, and aluminum(w/ special feeder)

Question 18

What do MIG welders require to work?

Answer 18

• Electricity to produce heat.
• An electrode to fill joint.
• Shielding has to protect weld from air.

Question 19

What are the most common MIG electrode types?

Answer 19

.023
.030
.035
.045

Question 20

MIG welding typically runs what three types of gases for shielding?

Answer 20

Argon, Carbon Dioxide and Helium

Question 21

What are the most common welding techniques?

Answer 21

• Whipping the rod(back and forth)
• Circles
• Weaving side to side(wider welds)

Question 22

What are the different welding positions?

Answer 22

• 1G(Flat)
• 2G(Horizontal)
• 3G(Vertical up)
• 4G(Overhead)