Questions and Answers
What does AC stand for?
Alternating Current
What is alternating current?
Current that regularly reverses the direction of its flow.
What measurement indicates the amount of current flowing in a circuit?
Amperage
An electrical terminal that usually carries a positive charge is known as an ______.
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A condition that occurs when the arc does not follow its intended path from the electrode to the workpiece is called ______ ____.
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The distance the arc stretches from the electrode to the workpiece is known as arc ______.
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A device found in generators that has many separate coils wound around it is called an ______.
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What is a CC welder?
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What does the term 'duty cycle' refer to?
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What is the definition of electricity?
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What is the purpose of a rectifier?
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What type of electrode is used for welding specialized materials that are susceptible to cracking?
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What does SCR stand for in welding technology?
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The relationship between the amount of power a welder draws from the power company and the amount of power it returns is known as ______ ______.
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A type of transformer that converts high-voltage, low-amperage industrial power to low-voltage, high-amperage power is called a - transformer.
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A magnet formed from electric current is known as an _______.
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Study Notes
Welding Electrical Terms and Concepts
- AC (Alternating Current): Current that reverses direction regularly; used in processes like GTAW.
- Direct Current (DC): Flow of current in one direction; essential for GMAW and FCAW.
- Amperage: Measurement of current in a circuit, quantified in amperes.
- Voltage: The electrical pressure driving current flow, measured in volts.
Welding Components and Operation
- Anode: Positive electrical terminal; crucial for SCR operation when negative.
- Cathode: Negative electrical terminal; must be positive for SCR activation.
- Arc Length: Distance between electrode and workpiece; longer lengths necessitate higher voltage.
- Electric Arc: Area where electrical discharge occurs, generating heat for melting metals.
Welding Processes
- Gas Tungsten Arc Welding (GTAW): Precise welding using a nonconsumable tungsten electrode.
- Gas Metal Arc Welding (GMAW): Involves a bare wire electrode and shielding gas, also known as MIG welding.
- Flux-Cored Arc Welding (FCAW): Uses a consumable electrode with a flux center.
- Shielded Metal Arc Welding (SMAW): Involves flux-coated rods, often called stick welding.
Power Sources and Electromagnetic Components
- Power Factor: Ratio of power drawn versus returned; optimal is 1 or 100%.
- Inverter: Welding power source using high frequency, improving energy efficiency.
- SCR (Silicon-controlled rectifier): Controls current direction in output, allowing for efficient power management.
- Transformer: Device that adjusts voltage levels through primary and secondary windings.
Electrical Measurements and Behavior
- Duty Cycle: Time duration a welder can operate in a given period without overheating; higher preferences are better.
- Resistance: Opposition to current flow; electricity prefers the path of least resistance.
- Output: Represents produced power types, including AC, DC, CC, and CV.
Safety and Operational Features
- Primary Voltage Shock: Risks from high voltage exposure during operation; safety precautions necessary.
- Hot Start: Feature that enables high initial settings to reduce sticking of electrodes.
- Reverse Polarity: Current flows from a negative workpiece to positive electrode; alters welding characteristics.
Specialized Electrodes and Techniques
- Low-Hydrogen Electrode: For welding materials prone to cracking.
- High-Deposition Electrode: Designed to deposit a larger filler metal amount.
- Pulse Welding: A method creating one droplet of metal at a time, requiring high welder settings.
Miscellaneous Concepts
- Inductance Coil/Choke: Smoothens DC power from rectifiers and affects amperage.
- Static Volt-Ampere Curve: Graphical representation of a welder's voltage versus amperage output.
- Energy Efficient: Devices using less electricity, reducing overall costs.
Miscellaneous Electrical and Magnetism
- Electromagnet: Formed by current, often used in devices requiring magnetic fields.
- Magnetic Field: Regions affected by magnetic forces, essential for electric motor functions.
- Field Winding: Electromagnet wire generating the magnetic field within generators.
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Description
Test your knowledge on key terms related to arc welding power sources with these flashcards. From definitions of alternating current to the concept of amperage, this quiz will help reinforce important concepts in welding technology. Perfect for students and professionals alike.
