BM2 Cut+Weld Chapter 2 Review

What is plasma in the context of Plasma Arc Cutting (PAC)?

• A) A solid material used in welding

• B) A gas heated to a high temperature by an electric arc

• C) A liquid used to cool the welding torch

• D) A type of metal used in construction

What is a pilot arc in Plasma Arc Cutting (PAC)?

• A) A high current arc between the torch and the workpiece

• B) A low current arc established between the electrode and the tip

• C) A type of shielding gas used in welding

• D) A cooling mechanism for the torch

What does the term "Transferred Arc" refer to in Plasma Arc Cutting (PAC)?

• A) The distance between the torch nozzle and the work

• B) The current flow between the electrode in the torch and the workpiece

• C) The high frequency current used to initiate the pilot arc

• D) The gas used to shield the welding area

What is the purpose of high frequency current in Plasma Arc Cutting (PAC)?

• A) To cool the welding torch

• B) To initiate the pilot arc

• C) To shield the welding area from oxidation

• D) To transfer the arc to the workpiece

What is the "Stand Off Distance" in Plasma Arc Cutting (PAC)?

• A) The distance between the torch nozzle and the work

• B) The distance between the electrode and the tip

• C) The distance between the power source and the torch

• D) The distance between the shielding gas and the plasma stream

What is the role of secondary shielding gas in Plasma Arc Cutting (PAC)?

• A) To initiate the pilot arc

• B) To protect the kerf walls from oxidation

• C) To cool the plasma torch

• D) To increase the temperature of the plasma

Which metals can be cut or gouged using plasma cutting systems?

• Only ferrous metals

• Only nonferrous metals

• Both ferrous and nonferrous metals

• Only stainless steel

What is the temperature range of the plasma stream in plasma cutting?

• 10,000 to 14,000 °F

• 18,000 to 25,000 °F

• 5,000 to 10,000 °F

• 25,000 to 30,000 °F

What is the amperage required to cut a metal with a thickness of 25.4 mm (1 inch)?

• 300 amps

• 400 amps

• 500 amps

• 600 amps

What type of power supplies are used in plasma cutting machines?

• AC rectifier or inverter-type

• DC rectifier or inverter-type

• AC transformer or inverter-type

• DC transformer or inverter-type