Recruiter's Glossary

Examples: Amperage • Heat Affected Zone • Shielding Gas

Polarity

Term from Welding industry explained for recruiters

Polarity in welding refers to how electricity flows through the welding equipment. It's like choosing which direction electricity should travel to make the best weld. There are two main types: Straight Polarity (also called DCEN - Direct Current Electrode Negative) and Reverse Polarity (also called DCEP - Direct Current Electrode Positive). This choice affects how hot the weld gets and how deep it goes into the metal. Think of it like adjusting the heat on a stove - different settings work better for different types of cooking, just as different polarities work better for different types of welding jobs.

Examples in Resumes

Expertly adjusted Polarity settings for various metal thicknesses and types

Trained new welders on proper DCEP and DCEN selection for different materials

Maintained quality standards through correct Polarity selection in structural welding projects

Typical job title: "Welders"

Also try searching for:

Certified Welder Structural Welder Pipe Welder Fabrication Welder TIG Welder MIG Welder Industrial Welder

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Example Interview Questions

Senior Level Questions

Q: How do you determine the correct polarity for different welding situations?

Expected Answer: A senior welder should explain how material type, thickness, and welding process influence polarity choice. They should mention specific examples like using DCEP for deeper penetration on thick steel and DCEN for thinner materials.

Q: How would you train someone on polarity selection?

Expected Answer: Should demonstrate teaching ability by explaining how they would break down polarity concepts into simple terms, show practical examples, and explain common mistakes to avoid.

Mid Level Questions

Q: What problems can wrong polarity cause and how do you identify them?

Expected Answer: Should describe visible signs of incorrect polarity like excessive spatter, poor penetration, or unstable arc, and explain how to correct these issues.

Q: Explain when you would use DCEP vs DCEN in your work.

Expected Answer: Should give practical examples of when each polarity type is appropriate, mentioning specific materials and situations from their experience.

Junior Level Questions

Q: What is the difference between straight and reverse polarity?

Expected Answer: Should be able to explain the basic concept that straight polarity (DCEN) flows one way and reverse polarity (DCEP) flows the opposite way, and mention that it affects weld heat and penetration.

Q: How do you check polarity on a welding machine?

Expected Answer: Should explain the basic process of checking the machine's settings and connections to ensure proper polarity setup before starting work.