Chapter #19 GTAW Equipment and Supplies Study Guide

What does TIG stand for?

• Tungsten Inert Gas

• Titanium Inert Gas

• Thermal Insulation Gas

• Turbine Ignition Gas

Answer explanation

TIG stands for Tungsten Inert Gas, which is a welding process that uses a non-consumable tungsten electrode to produce the weld. The other options do not accurately describe this welding technique.

What is the term for an electrode that does not melt and become part of the weld?

• Nonconsumable electrode

• Consumable electrode

• Filler electrode

• Arc electrode

Answer explanation

A nonconsumable electrode does not melt during the welding process and remains intact, unlike a consumable electrode, which melts and becomes part of the weld. Therefore, the correct term is nonconsumable electrode.

Name the basic parts of a GTAW setup.

• Weld machine, torch, inert gas supply (gas cylinder)

• Weld machine, soldering iron, flux

• Torch, gas cylinder, welding rod

• Inert gas supply, hammer, anvil

Answer explanation

The correct choice includes the essential components for Gas Tungsten Arc Welding (GTAW): a weld machine to generate power, a torch to direct the arc, and an inert gas supply (gas cylinder) to protect the weld area.

Name the personal protective (PPE) that is required when welding with GTAW.

• Helmet #10, gloves, fire-resistant clothing

• Safety goggles, earplugs, rubber boots

• Hard hat, high-visibility vest, steel-toed boots

• Dust mask, safety glasses, lab coat

Answer explanation

When welding with GTAW, a #10 helmet is essential to protect the eyes from intense light and UV radiation. Gloves and fire-resistant clothing are also necessary to protect against heat and sparks, making this the correct choice.

Name three electrical settings when using a GTAW machine.

• Current range, high-frequency voltage, current type

• Wire feed speed, gas flow rate, electrode angle

• Torch angle, travel speed, arc length

• Shielding gas type, base metal thickness, filler material

Answer explanation

The correct choice includes essential electrical settings for GTAW: 'current range' determines the welding power, 'high-frequency voltage' stabilizes the arc, and 'current type' (AC or DC) affects the welding process.

What must be connected to the power supply for GTAW welding?

• Ground lead, weld torch, foot pedal, thumb control, cooling water hose

• Welding helmet, safety gloves, protective clothing, safety boots

• Gas cylinder, regulator, flow meter, gas hose

• Welding table, clamps, workpiece, measuring tools

Answer explanation

For GTAW welding, the ground lead, weld torch, foot pedal, thumb control, and cooling water hose must be connected to the power supply to ensure proper operation and safety during the welding process.

What does DCSP stand for?

• Direct Current Straight Polarity

• Direct Current Standard Polarity

• Dynamic Current Straight Polarity

• Direct Current Simple Polarity

Answer explanation

DCSP stands for Direct Current Straight Polarity, which is the correct choice. The other options do not accurately represent the standard terminology used in electrical contexts.

AC welding, the current changes direction of travel how many times a second?

• 120

• 60

• 100

• 80

Answer explanation

In AC welding, the current alternates direction 120 times per second, which corresponds to a frequency of 60 Hz (60 cycles per second) with each cycle consisting of two changes in direction. Thus, the correct answer is 120.

What is the term used when current does not flow in the electrode-positive half cycle?

• Rectified

• Inverted

• Neutralized

• Reversed

Answer explanation

The term 'rectified' refers to the process where current does not flow during the electrode-positive half cycle, effectively converting alternating current (AC) to direct current (DC) by allowing flow only in one direction.

When the current in the electrode-positive half cycle is less than desired, it is referred to as?

• Partially rectified

• Over-rectified

• Under-rectified

• Fully rectified

Answer explanation

When the current in the electrode-positive half cycle is less than desired, it indicates that the rectification is not complete, hence it is termed 'partially rectified'. This choice correctly describes the situation.