Why Is an Inert Shielding Gas Required for GTA Welding

question 27

Multiple Choice

Why is an inert shielding gas required for GTA welding?

• A) To keep the air away from the hot tungsten and molten weld metal
• B) To help remove the welding fumes to make it easier to see the weld pool
• C) To help reduce the UV light that can cause skin burns
• D) All of the above

---

Definitions:

Marginal Product

The additional output resulting from the use of one more unit of a production factor.

Factor Of Production

An economic term describing the inputs used in the production of goods or services to earn an income, namely labor, capital, land, and entrepreneurship.

Marginal Productivity Theory

A theory stating that the demand for a factor of production is derived from the marginal product that the factor adds to the output.

Equilibrium Value

The price and quantity at which supply and demand in a market are balanced.