Final Review

Question 1

What are common thermal cutting processes?

Answer 1

Oxy-fuel cutting, Plasma arc cutting (PAC), Laser cutting

Question 2

What does GMAW stand for?

Answer 2

Gas Metal Arc Welding

Question 3

What type of welding uses a non-consumable tungsten electrode?

Answer 3

GTAW (Gas Tungsten Arc Welding)

Question 4

What is the main difference between consumable and non-consumable electrodes?

Answer 4

Consumable melts to form part of the weld; non-consumable does not melt.

Question 5

What are critical welds typically used for?

Answer 5

High-strength applications (e.g., bridges, pressure vessels)

Question 6

What should be inspected for safe practices in welding?

Answer 6

Equipment and workspace

Question 7

What types of light are emitted during welding?

Answer 7

Visible, ultraviolet (UV), infrared (IR)

Question 8

What is the first degree burn characterized by?

Answer 8

Redness; cool with water

Question 9

What type of clothing is recommended for welding?

Answer 9

Flame-resistant jackets, welding gloves, safety boots, aprons

Question 10

What is DCEN in welding?

Answer 10

Direct Current Electrode Negative

Question 11

What does voltage represent in electrical units?

Answer 11

Electrical potential

Question 12

What is the relationship defined by Ohm’s Law?

Answer 12

Resistance to current flow

Question 13

What does the duty cycle refer to in SMAW?

Answer 13

Operating time before overheating

Question 14

What is the classification of SMAW electrodes based on?

Answer 14

Electrode class and coating type

Question 15

What is the tensile strength of E7018?

Answer 15

70,000 PSI

Question 16

What are the joint types in welding?

Answer 16

Butt, corner, edge, lap, T-joints

Question 17

What are stringer beads in welding?

Answer 17

Straight, narrow weld beads

Question 18

What is a key advantage of TIG welding?

Answer 18

High-quality welds, suitable for thin materials

Question 19

What types of tungsten electrodes are used in TIG welding?

Answer 19

Pure tungsten, thoriated, ceriated, lanthanated

Question 20

What is the typical color code for pure tungsten electrodes?

Answer 20

Green

Question 21

What is argon used for in TIG welding?

Answer 21

Universal gas for TIG

Question 22

What method is used for arc initiation in TIG welding?

Answer 22

Scratch Start, Lift Start, High-Frequency Start

Question 23

What is the purpose of purging in welding?

Answer 23

To protect backside welds from oxidation

Question 24

What defect is caused by contamination in welding?

Answer 24

Porosity

Question 25

What personal protective equipment (PPE) is necessary for TIG welding?

Answer 25

Heat-resistant gloves, welding helmets, protective clothing

Question 26

What is the typical range for shielding gas flow rates?

Answer 26

10-20 CFH

Question 27

What is the disadvantage of TIG welding?

Answer 27

Slower process, requires skill, higher cost

Question 28

What is the electrode angle typically set at during welding?

Answer 28

10-30° from vertical

Question 29

What are the common types of welding defects?

Answer 29

Porosity, Undercut, Lack of Fusion

Question 30

Fill in the blank: The flow of electric current is measured in _______.

Answer 30

Amperage

Question 31

True or False: AC is primarily used for welding steel.

Answer 31

False