Welding Principles and Applications Chapter 16 review questions

Which of the following is true of grinding tungsten electrodes?

If the grinder is used for metals other than tungsten, particles of these metals may become trapped on the tungsten as it is ground, resulting in contamination when the arc is started.

Which of the following is true of erosion of the tungsten electrode?

Slow erosion results in limited tungsten inclusions in the weld.

The gas tungsten arc welding process is sometimes referred to as ___.

TIG

Which of the following is true of DCEN?

With DCEN, a pointed tip concentrates the arc

The ___ directs the shielding gas directly on the welding zone.

Nozzle

___ is the time during which the gas continues flowing after the welding current has stopped.

Postflow

AC concentrates about _____ of its welding heat on the work and ______ on the tungsten.

2/3, 1/3

The ___ is cone-shaped sleeve that holds the electrode in the torch.

Collet

Which of the following is true of DCEP?

DCEP has the highest heat concentration on the electrode tip.

DCEP has the lowest heat connection on the electrode tip.

False

When the GTAW process was the first developed, argon was the primary shielding gas used.

False