GTAW WLD 150 Welding And Joining Practice Test

Tungsten inclusions are particles from a nonconsumable tungsten electrode that enter the weld.

From a consumable electrode They originate from filler metal They are caused by porosity True

Correct Answer:

True

Explanation:

In GTAW, you use a nonconsumable tungsten electrode to establish the arc while filler metal is added separately. Occasionally, tiny particles of tungsten can shed from the electrode and get carried into the molten weld pool, becoming trapped as the weld cools. These are solid inclusions, distinct from porosity (gas pockets) and from filler metal, which is added separately. So the statement is correct: tungsten inclusions are particles from a nonconsumable tungsten electrode that enter the weld. Preventive steps include keeping the electrode clean, avoiding contact with the work and using proper amperage and technique to minimize electrode wear.

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