10. TIG Welding Basics

What does TIG stand for in TIG welding?

• Torch Ignition Gas

• Tungsten Inert Gasoline

• Tungsten Inert Gas

• Titanium Inert Gas

Name one advantage of TIG welding over other welding techniques.

• High-quality, clean welds

• Low welding speed

• Limited material compatibility

• Messy welds

Explain the difference between AC and DC TIG welding.

• DC TIG welding uses alternating current, while AC TIG welding uses direct current.

• AC TIG welding uses alternating current, while DC TIG welding uses direct current.

• AC TIG welding is more expensive than DC TIG welding.

• AC TIG welding is used for underwater welding, while DC TIG welding is used for overhead welding.

What type of current is typically used in TIG welding?

• Pulse current

• Alternating current (AC)

• High voltage current

• Direct current (DC)

What is the purpose of a filler rod in TIG welding?

• To increase the welding speed

• To provide additional material to the weld joint

• To cool down the welding area

• To prevent sparks during welding

Describe the technique of 'walking the cup' in TIG welding.

• Walking the cup involves moving the torch in a side-to-side motion while keeping the cup in contact with the workpiece, creating a controlled weld pool movement.

• Walking the cup means lifting the torch away from the workpiece

• Walking the cup is a technique used in MIG welding

• Walking the cup involves standing still while welding

Why is it important to wear protective gear during TIG welding?

• To enhance the aesthetic appeal of the weld

• To improve vision clarity

• To keep the welding area clean

• To prevent exposure to harmful UV radiation, sparks, and hot metal particles.

What is the role of shielding gas in TIG welding?

• Shielding gas in TIG welding is used to cool down the welding torch.

• The main purpose of shielding gas in TIG welding is to increase the speed of the welding process.

• Shielding gas in TIG welding is primarily used for cleaning the metal surface before welding.

• Shielding gas in TIG welding protects the weld pool from atmospheric contamination and stabilizes the electric arc.

What are some common mistakes to avoid when TIG welding?

• Holding the torch too far from the workpiece

• Neglecting to wear proper safety gear

• Using a rusty filler rod

• Improper gas flow, incorrect tungsten electrode size or type, using the wrong filler rod, not cleaning the base metal properly, improper torch angle or travel speed

Explain the concept of 'heat input' in TIG welding.

• Heat input in TIG welding is the type of gas used in the welding process

• Heat input in TIG welding is the amount of heat energy transferred to the workpiece during the welding process.

• Heat input in TIG welding is the speed at which the welder moves the torch

• Heat input in TIG welding refers to the color of the welding torch