Plasma arc cutting (PAC) is a process that uses an arc and a high-velocity, ionized gas coming through a constricting nozzle.

A lead with a larger diameter will have less voltage drop than a lead with a smaller diameter.

The terms back welding and backing strip are interchangeable.

Where is the root of the weld positioned on a root bend test sample after bending?

Which of the following metals is not used to make PAC electrodes?

The root opening for an open root fitup is exactly the same as the fitup for the backing strip.

There are two key considerations in determining the size (diameter) of the electrode and workpiece leads to be used. One is the maximum amperage to be carried. What is the other?

It is acceptable to use compressed oxygen as a substitute for compressed air for carbon arc cutting or gouging.

When metal is heated it _____.

What is the Research Hypothesis, and the test result? Select the correct combination from the options.