Welding Essentials: Questions & Answers (Expanded Edition)

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Expanded to include a new and heavily illustrated chapter on fabrication and repair tips. Presents all essential material for beginning welders in small, easy-to-read and understand units. Introduces the beginning welder to weld inspection, welding symbols and qualification and certification issues. Can be used in conjunction with welding processes and safety seminars, and as a result become a tremendous asset to companies needing to log and claim that they put printed safety materials into employees' hands. Discusses the difference between constant voltage and constant current power supplies and traces the development of welding power supplies from motor-generator sets to transformers to the inverters of today. A metallurgy chapter explains how welding heat affects metals' properties and how to minimize its negative effects and provides a clear explanation of hardening, tempering and heat treating steel. More than 300 illustrations clarify and detail explanations of every subject. Includes a comprehensive glossary in English and Spanish.