Plasma Arc Cutting Quiz

What state of matter is plasma?

• Gas

• Liquid

• Solid

• Superheated gas

What is the advantage of plasma arc cutting over oxyfuel cutting?

• Requires preheating

• Minimal distortion and heat-affected zones

• Can only cut certain metals

• Uses dangerous gases

What is the most common electrode used in plasma arc cutting with air as plasma gas?

• Hafnium

• Tungsten

• Argon

• Zirconium

What is the purpose of the swirl ring in a PAC torch assembly?

• Protects torch from heat of cutting process

• Attaches to torch body

• Provides path for cutting gas

• Causes plasma gas to rotate within torch

What type of power supply is used for medium- and heavy-duty PAC machines?

• Constant current power supply

• Direct current electrode negative (DCEN)

• High-frequency generator

• Inverter power supplies

What is the recommended protective clothing for PAC?

• Sweater and skirt

• Welding jacket and gloves

• Tank top and jeans

• Shorts and t-shirt

What is the purpose of the constricting nozzle in a PAC torch?

• Forces gas to pass through arc

• Causes plasma gas to rotate within torch

• Protects torch from heat of cutting process

• Provides path for cutting gas

What should be the direction of travel when performing plasma arc gouging to keep a specific side of the kerf?

• Upwards

• Clockwise

• Downwards

• Counterclockwise

What is the purpose of plasma arc gouging?

• Requires preheating

• Melts metals and blows molten metal through cut

• Cuts metals using arc and high-velocity, ionized gas

• Removes only portion of metal thickness

What gas is commonly used as the shielding gas for plasma arc gouging?

• Argon/helium

• Nitrogen

• Oxygen

• Argon/hydrogen