Why Is the Root Pass Weld Started on Top of a Tack

question 6

Multiple Choice

Why is the root pass weld started on top of a tack weld?

• A) To eliminate the potential lack of fusion
• B) To prevent porosity caused by the lack of shielding gas at the instant the weld starts
• C) So the arc light will show the root opening and make it easier to get aligned with the root opening as the weld moves off of the tack weld
• D) The root pass can be started anywhere it is comfortable for the welder to begin welding.

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Definitions:

Psychoanalytic Theory

A comprehensive framework for understanding human behavior that emphasizes the role of unconscious processes and early childhood experiences.

Unconscious

Pertaining to the part of the mind that is inaccessible to the conscious mind but that affects behavior and emotions.

Looking-glass Self

A social psychological concept asserting that a person's self grows out of society's interpersonal interactions and the perceptions of others.

Symbolic Interactionism

A theory in sociology that emphasizes the role of symbols and language as core elements of all human interaction.