Plasma/CAC-A gouging and cutting

What does PAC use to melt and remove metal?

• A high-velocity jet of ionized gas (plasma)

• A stream of water

• A rotating abrasive wheel

• A chemical etching solution

On what polarity does Plasma Arc Cutting (PAC) operate?

• DC straight polarity (DCSP)

• AC polarity

• DC reverse polarity (DCRP)

• Pulsed DC polarity

What is the temperature range for Plasma Arc Cutting (PAC)?

• 10,000°C to 14,000°C

• 1,000°C to 2,000°C

• 500°C to 1,000°C

• 2,000°C to 4,000°C

Plasma: ________ gas acting as a conductor.

• Ionized

• Neutral

• Compressed

• Cold

Standoff distance: Nozzle-to-workpiece distance (approximately ________ mm).

• 6.4–10

• 1–2

• 15–20

• 25–30

Dual flow torch: Uses separate ________ and shielding gases.

• plasma

• electrodes

• nozzles

• wires

What is the open circuit voltage range for the Power Supply in PAC Equipment?

• 120–400 V

• 50–100 V

• 400–800 V

• 10–50 V

Which type of electrode is used in the Torch for PAC Equipment?

• Non-consumable electrode (hafnium, tungsten)

• Consumable electrode (copper)

• Graphite electrode

• Carbon rod

Control systems in PAC Equipment may be manual, semi-automatic, or CNC.

• True

• False

Which gas blend is used for aluminum and stainless steel in PAC Equipment?

• Argon/hydrogen blends

• Oxygen/acetylene blends

• Nitrogen/carbon dioxide blends

• Helium/argon blends