What is it called when welding wire becomes tangled inside the wire feeder?

A flux cored electrode that protects the weld zone from contaminants with fluxing elements released from the core of the wire itself is called:

Which of the following best describes the type of electrode used for FCAW:

drive roll mechanism(4).JPG Letter D is:  [BLANK-1]

What type of drive rolls are best for the FCAW electrode wire?

Nozzle to work diagram.JPG Match the terms with the letter in the diagram:

Equipment used for the FCAW process is similar to the equipment used for GMAW.

drive roll mechanism(3).JPG Letter E is:  [BLANK-1]

Which of the choices below are factors in determining the timing of tracheostomy tube placement? Select all that apply. 

The most common storage method for oxygen in large health care facilities is: