Final Review Flashcards
What are common thermal cutting processes?
Oxy-fuel cutting, Plasma arc cutting (PAC), Laser cutting
What does GMAW stand for?
Gas Metal Arc Welding
What type of welding uses a non-consumable tungsten electrode?
GTAW (Gas Tungsten Arc Welding)
What is the main difference between consumable and non-consumable electrodes?
Consumable melts to form part of the weld; non-consumable does not melt.
What are critical welds typically used for?
High-strength applications (e.g., bridges, pressure vessels)
What should be inspected for safe practices in welding?
Equipment and workspace
What types of light are emitted during welding?
Visible, ultraviolet (UV), infrared (IR)
What is the first degree burn characterized by?
Redness; cool with water
What type of clothing is recommended for welding?
Flame-resistant jackets, welding gloves, safety boots, aprons
What is DCEN in welding?
Direct Current Electrode Negative
What does voltage represent in electrical units?
Electrical potential
What is the relationship defined by Ohm’s Law?
Resistance to current flow
What does the duty cycle refer to in SMAW?
Operating time before overheating
What is the classification of SMAW electrodes based on?
Electrode class and coating type
What is the tensile strength of E7018?
70,000 PSI
What are the joint types in welding?
Butt, corner, edge, lap, T-joints
What are stringer beads in welding?
Straight, narrow weld beads
What is a key advantage of TIG welding?
High-quality welds, suitable for thin materials
What types of tungsten electrodes are used in TIG welding?
Pure tungsten, thoriated, ceriated, lanthanated
What is the typical color code for pure tungsten electrodes?
Green
What is argon used for in TIG welding?
Universal gas for TIG
What method is used for arc initiation in TIG welding?
Scratch Start, Lift Start, High-Frequency Start
What is the purpose of purging in welding?
To protect backside welds from oxidation
What defect is caused by contamination in welding?
Porosity
What personal protective equipment (PPE) is necessary for TIG welding?
Heat-resistant gloves, welding helmets, protective clothing
What is the typical range for shielding gas flow rates?
10-20 CFH
What is the disadvantage of TIG welding?
Slower process, requires skill, higher cost
What is the electrode angle typically set at during welding?
10-30° from vertical
What are the common types of welding defects?
Porosity, Undercut, Lack of Fusion
Fill in the blank: The flow of electric current is measured in _______.
Amperage
True or False: AC is primarily used for welding steel.
False
