Safety First
What does PPE stand for?
Personal Protective Equipment
What two gases are commonly used in oxyfuel cutting?
Oxygen and acetylene
Plasma cutting is mainly used to cut what type of material?
Electrically conductive metal
What type of electrode is used for air carbon arc cutting?
A carbon or graphite electrode
What tool is commonly used to remove slag from a weld?
Chipping hammer
What PPE protects your eyes from sparks and flying metal?
Safety glasses
What device controls the pressure coming from a gas cylinder?
Regulator
What must normally be attached to the workpiece before plasma cutting?
The work clamp or ground clamp
What removes the molten metal during air carbon arc gouging?
Compressed air
What tool is commonly used to clean a weld after the slag is removed?
Wire brush or wire wheel
Why should pants be worn over the tops of welding boots?
To keep sparks and hot metal from falling inside the boots.
What is the purpose of the cutting oxygen lever on an oxyfuel torch?
It releases high-pressure oxygen that cuts through the heated metal.
What is the narrow opening made by a cutting process called?
Kerf
Air carbon arc gouging is commonly used to remove what?
Weld metal or defective welds
What is a tack weld?
A small weld used to hold pieces in position before final welding.
What should you do before using welding or cutting equipment?
Inspect the equipment and work area for hazards.
What color is commonly used for the oxygen hose?
Green
What is the melted material that may stick to the bottom of a plasma cut called?
Dross
What must be maintained between the electrode and the workpiece during gouging?
An arc
What is undercut?
A groove melted into the base metal beside the weld that is not properly filled.
Name three pieces of PPE that may be required when cutting metal.
Safety glasses, face shield or welding hood, gloves, hearing protection, proper clothing, or boots.
Why should oil or grease never be used on oxygen equipment?
It can react violently with oxygen and cause a fire or explosion.
Name two things that can cause poor plasma-cutting quality.
Incorrect travel speed, worn consumables, incorrect air pressure, incorrect amperage, or incorrect torch distance.
Why is hearing protection especially important during air carbon arc gouging?
The process produces very high noise levels.
What is the difference between penetration and fusion?
Penetration is how deeply the weld enters the base metal. Fusion is the joining or melting together of the weld metal and base metal.