Cutting Chapter 4

Question 1

The CAC process can be used in all positions on any metal that will conduct electricity.

Answer 1

True

Question 2

Ex CAC process on metals

Answer 2

carbon steel
stainless steel
cast iron
copper and their alloys

Question 3

How can CAC primarily be used to do what 4 processes?

Answer 3

To gouge weld groves
to back gouge welds
to gouge out defective welds
prepare cracks for welding.

Question 4

The currents used with CAC-A electrodes are much higher than those required for……

Answer 4

comparably sized shielded metal arc welding electrodes

Question 5

The connecting cable of the CAC-A torch contains both of what things?

Answer 5

Electrical cable

Compressed air hose

Question 6

What current welding machines may be used to supple power to CAC-A torches?

Answer 6

AC or DC

Question 7

DC or AC welding machines preferred?

Answer 7

DC

Question 8

A CAC-A torch requires what to blow the molten metal from the cut.

Answer 8

regulated compressed air

Question 9

How should the regulator be set for?

Answer 9

The lowest pressure that will reliably do the job.

Question 10

During cutting or gouging activites of CAC-A, what tends to happen with the molten metal

Answer 10

Splatter

Question 11

Because of molten metal splattering, you have to make sure what?

Answer 11

Fire resistant shields or screen are set up to protect personnel and equipment near the work area.

Question 12

You don’t need to make sure a fire watch is posted.

Answer 12

F

Question 13

3 basic types of CAC-A electrodes

Answer 13

Plain
Copper-coated for direct current
Copper- coated for alternating current

Question 14

How are round electrode sizes are specified by what

Answer 14

Diameter

Question 15

Flat electrodes are specified by the what?

Answer 15

Width of their widest side.

Question 16

CAC-A work generates what 3 things?

Answer 16

Loud Noise
Heavy Smoke
Fumes

Question 17

Where should you be sure to ground the clamp?

Answer 17

Position it where the welding current will not pass through seals, bearings or other contacting surfaces that could be damaged from arching.

Question 18

Groove depth and contour are controlled by what 3 things?

Answer 18

Electrode Travel Angle
Tip Side Movement
Travel Speed

Question 19

For a shallow gouge, the electrode is what?

Answer 19

Advanced at a rapid rate.

Question 20

Notches left in a base metal have a tendency to what?

Answer 20

Trap slag during welding

Question 21

Dross or carbon deposits left on a surface to be welded will what

Answer 21

Combine with the base metal.

Question 22

Dross or carbon deposits left on a surface to be welded will combine with the base metal will form what?

Answer 22

Hard, brittle zones and porosity in the weld zone.

Question 23

Process of cutting a groove into a surface usually to prepare it for welding.

Answer 23

Gouging

Question 24

With CAC-A gouging, the electrode size determines the what?

Answer 24

Minimum groove width.

Question 25

Groove depth and bottom contour are determined by the what?

Answer 25

Electrode travel angle and speed.