NCCER Plasma Arc Cutting - Module 3

Front

In plasma arc cutting, plasma is created by ____

Back

superheating gas in an electric arc

Answer explanation

Page Ref: Sec. Ref. 1.0.0 Objective: 1a

Front

In most cases, plasma arc cutting is ___

Back

faster and more efficient than other cutting methods

Answer explanation

Page Ref: Sec. Ref. 1.0.0 Objective: 1a

Front

Which of the following PPE is considered optional for plasma arc cutting? Hearing protection, Safety glasses, A full leather hood, High-top shoes or boots

Back

A full leather hood

Answer explanation

Page Ref: Sec. Ref. 1.2.1 Objective: 1b

Front

Which of the following safety statements related to plasma arc cutting is true? A hot-work permit is not required for plasma arc cutting due to the nature of the process. Both methane and propane are lighter than air and rise quickly from the work area if released. Never carry matches or gas-filled lighters in your pockets. Unlike oxyfuel cutting, a vessel can be cut safely with plasma regardless of its contents.

Back

Never carry matches or gas-filled lighters in your pockets.

Answer explanation

Page Ref: Sec. Ref. 1.2.2 Objective: 1b

Front

The simplest plasma arc cutting units use filtered .

Back

compressed air

Answer explanation

Page Ref: Sec. Ref. 2.1.0 Objective: 2a

Front

Industrial plasma cutting units can cut carbon steel up to .

Back

3" thick

Answer explanation

Page Ref: Sec. Ref. 2.1.0 Objective: 2a

Front

The most common plasma arc cutting torch uses .

Back

a pilot arc with the transferred arc process

Answer explanation

Page Ref: Sec. Ref. 2.2.0 Objective: 2b

Front

The typical plasma arc cutting torch contains a.

Back

retaining cup, copper electrode with a hafnium or thoriated tungsten insert, gas swirl ring, and nozzle

Answer explanation

Page Ref: Sec. Ref. 2.2.0 Objective: 2b

Front

The term standoff distance refers to the .

Back

distance between the torch tip and the workpiece

Answer explanation

Page Ref: Sec. Ref. 2.2.0 Objective: 2b

Front

Most heavy-duty plasma arc cutting systems require one gas cylinder containing the cutting gas and another containing ___.

Back

shielding or cooling gas

Answer explanation

Page Ref: Sec. Ref. 2.3.2 Objective: 2c