In TIG welding, what is created when the base metal melts?

• A weld bead

• A solid joint

• A weld pool

• A heat zone

What is the main function of the arc in TIG welding?

• To solidify the weld

• To melt the base metal

• To add filler metal

• To retract the electrode

What is the result of TIG welding's excellent control over the arc and heat input?

• High-quality, smooth welds with minimal distortion

• Faster welding times

• Increased material waste

• Lower energy consumption

What is a primary advantage of TIG welding in terms of material compatibility?

• It can only weld ferrous metals.

• It is suitable for a wide range of materials.

• It is limited to non-metal materials.

• It can only weld precious metals.

How does TIG welding achieve high-quality welds?

• By using high temperatures

• By offering excellent control over the arc and heat input

• By using low-cost materials

• By requiring less skill

On what basis should the appropriate electrode diameter be selected?

• Color of the electrode

• Material thickness and welding current

• Length of the electrode

• Temperature of the environment

What is the main consideration for selecting electrode material?

• Electrode color

• Base metal and welding process parameters

• Electrode length

• Electrode temperature

What is the effect of not sharpening the electrode tip properly?

• Change in electrode color

• Improper arc initiation, instability, and poor current distribution

• Increase in electrode length

• Reduction in weld temperature

What does porosity in a weld bead result from?

• Air bubbles

• Excessive heat

• Slow cooling

• High pressure

What is a potential consequence of improper welding technique in TIG welding?

• Porosity

• Lack of Fusion

• Undercut

• Excessive heat